Spårning 2.0: spikfilter, pausad start med play/nedräkning, paus, steg, historikkarta

Baserat på analys av verklig GPS-data (25 av 180 segment var ut-och-tillbaka-
spikar = 527 av 1090 m fejkdistans; filtret simulerat på datan: 9,1 → 5,4 km/h
= realistisk gångfart):
- 1 s-sampling + lag-buffrat spikfilter: en punkt committas först när nästa
  setts; triangel-kollapser (ut ≥4 m och direkt tillbaka) slängs
- Douglas-Peucker-nedbantning (4 m) före sparning — 182 → 16 punkter i testet
- Start i READY (pausad): play → inställbar nedräkning (0–15 s, standard 3)
  → aktiv; paus/fortsätt med bruten positionskedja så pausförflyttning
  inte räknas; tid ackumuleras bara i aktiv fas
- Stegräkning via TYPE_STEP_COUNTER under aktiv tid (ACTIVITY_RECOGNITION-
  behörighet; steg sparas på aktiviteten och räknas i dagsmätaren/målen
  när Health Connect saknas)
- Historikkarta: 🗺-knapp på spårade aktiviteter → OSM-karta med rutten
- Version 0.12.0

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01C2GA94E1f3cmrvdQLQhYdg

app/build.gradle.kts

@@ -29,7 +29,7 @@ android {
         minSdk = 31
         targetSdk = 35
         versionCode = ciRunNumber ?: 1
-        versionName = "0.11.0" + (ciRunNumber?.let { "+build.$it" } ?: "-dev")
+        versionName = "0.12.0" + (ciRunNumber?.let { "+build.$it" } ?: "-dev")
     }
 
     signingConfigs {

app/src/main/AndroidManifest.xml

@@ -33,6 +33,8 @@
 
     <!-- Stegsynk via Health Connect (etapp 5) -->
     <uses-permission android:name="android.permission.health.READ_STEPS" />
+    <!-- Telefonens stegsensor under spårade aktiviteter -->
+    <uses-permission android:name="android.permission.ACTIVITY_RECOGNITION" />
 
     <application
         android:name=".FitnessDroidApplication"

app/src/main/java/eu/brassepc/fitnessdroid/data/ActivityKcal.kt

@@ -108,3 +108,72 @@ private fun encodeDiff(diff: Long, sb: StringBuilder) {
     }
     sb.append((v + 63).toInt().toChar())
 }
+
+
+/** Avkoda Google encoded polyline (precision 1e5) → [(lat, lon)]. */
+fun decodePolyline(encoded: String): List<Pair<Double, Double>> {
+    val points = mutableListOf<Pair<Double, Double>>()
+    var index = 0
+    var lat = 0L
+    var lon = 0L
+    while (index < encoded.length) {
+        for (which in 0..1) {
+            var result = 0L
+            var shift = 0
+            while (true) {
+                val b = (encoded[index].code - 63).toLong()
+                index++
+                result = result or ((b and 0x1f) shl shift)
+                shift += 5
+                if (b < 0x20) break
+            }
+            val delta = if ((result and 1L) != 0L) (result shr 1).inv() else (result shr 1)
+            if (which == 0) lat += delta else lon += delta
+        }
+        points.add(lat / 1e5 to lon / 1e5)
+    }
+    return points
+}
+
+/**
+ * Douglas–Peucker-nedbantning av en rutt: tar bort punkter som ligger inom
+ * [epsilonMeters] från linjen mellan sina grannar. Kraftigt färre punkter i
+ * databasen utan att ruttens form ändras nämnvärt.
+ */
+fun simplifyRoute(points: List<Pair<Double, Double>>, epsilonMeters: Double = 4.0): List<Pair<Double, Double>> {
+    if (points.size < 3) return points
+    val lat0 = Math.toRadians(points[0].first)
+    // approximativ projektion till meter (räcker gott för korta rutter)
+    fun xy(p: Pair<Double, Double>) = (p.second * 111_320 * Math.cos(lat0)) to (p.first * 110_540)
+    val proj = points.map { xy(it) }
+    val keep = BooleanArray(points.size)
+    keep[0] = true
+    keep[points.size - 1] = true
+
+    val stack = ArrayDeque<Pair<Int, Int>>()
+    stack.addLast(0 to points.size - 1)
+    while (stack.isNotEmpty()) {
+        val (a, b) = stack.removeLast()
+        val (ax, ay) = proj[a]
+        val (bx, by) = proj[b]
+        val dx = bx - ax
+        val dy = by - ay
+        val norm = Math.hypot(dx, dy).coerceAtLeast(1e-9)
+        var worst = -1
+        var worstDist = 0.0
+        for (i in a + 1 until b) {
+            val (px, py) = proj[i]
+            val d = Math.abs(dy * (px - ax) - dx * (py - ay)) / norm
+            if (d > worstDist) {
+                worstDist = d
+                worst = i
+            }
+        }
+        if (worstDist > epsilonMeters && worst > 0) {
+            keep[worst] = true
+            stack.addLast(a to worst)
+            stack.addLast(worst to b)
+        }
+    }
+    return points.filterIndexed { i, _ -> keep[i] }
+}

app/src/main/java/eu/brassepc/fitnessdroid/data/GymApi.kt

@@ -31,6 +31,8 @@ data class Activity(
     val rpe: Double? = null,
     val source: String = "manual",
     val notes: String? = null,
+    val steps: Int? = null,
+    val routePolyline: String? = null,
     val activityType: ActivityType,
 )
 
@@ -135,6 +137,7 @@ class GymApi(
         source: String? = null,
         routePolyline: String? = null,
         notes: String? = null,
+        steps: Int? = null,
     ): Activity {
         val data = client.execute(
             "mutation(\$input: AddActivityInput!){addActivity(input:\$input){$ACTIVITY_FIELDS}}",
@@ -146,6 +149,7 @@ class GymApi(
                     distanceMeters?.let { put("distanceMeters", it) }
                     elevationGainMeters?.let { put("elevationGainMeters", it) }
                     rpe?.let { put("rpe", it) }
+                    steps?.let { put("steps", it) }
                     estimatedKcal?.let { put("estimatedKcal", it) }
                     source?.let { put("source", it) }
                     routePolyline?.let { put("routePolyline", it) }
@@ -243,7 +247,7 @@ class GymApi(
 
     companion object {
         private const val ACTIVITY_FIELDS =
-            "id startedAt durationSeconds distanceMeters elevationGainMeters estimatedKcal rpe source notes " +
+            "id startedAt durationSeconds distanceMeters elevationGainMeters estimatedKcal rpe source notes steps routePolyline " +
                 "activityType{id key nameSv nameEn met category isDistanceBased isCardio iconKey}"
         private const val MY_PROFILE =
             "query{myProfile{username displayName email bodyWeightKg heightCm birthYear sex}}"

app/src/main/java/eu/brassepc/fitnessdroid/data/SettingsStore.kt

@@ -44,6 +44,8 @@ data class AppSettings(
     val motionGuardEnabled: Boolean = true,
     /** Rörelsevaktens känslighet (m/s² avvikelse från vila; lägre = känsligare) */
     val motionThreshold: Double = 0.35,
+    /** Nedräkning (sekunder) när man trycker play på en aktivitet */
+    val countdownSeconds: Int = 3,
 )
 
 class SettingsStore(private val context: Context) {
@@ -76,9 +78,14 @@ class SettingsStore(private val context: Context) {
             gpsSpeedFloorKmh = prefs[KEY_GPS_FLOOR] ?: 12,
             motionGuardEnabled = prefs[KEY_MOTION_GUARD]?.toBooleanStrictOrNull() ?: true,
             motionThreshold = prefs[KEY_MOTION_THRESHOLD]?.toDoubleOrNull() ?: 0.35,
+            countdownSeconds = prefs[KEY_COUNTDOWN] ?: 3,
         )
     }
 
+    suspend fun setCountdownSeconds(value: Int) {
+        context.settingsDataStore.edit { it[KEY_COUNTDOWN] = value.coerceIn(0, 15) }
+    }
+
     suspend fun setMotionGuardEnabled(value: Boolean) {
         context.settingsDataStore.edit { it[KEY_MOTION_GUARD] = value.toString() }
     }
@@ -182,5 +189,6 @@ class SettingsStore(private val context: Context) {
         private val KEY_GPS_FLOOR = intPreferencesKey("gps_speed_floor_kmh")
         private val KEY_MOTION_GUARD = stringPreferencesKey("motion_guard_enabled")
         private val KEY_MOTION_THRESHOLD = stringPreferencesKey("motion_threshold")
+        private val KEY_COUNTDOWN = intPreferencesKey("countdown_seconds")
     }
 }

app/src/main/java/eu/brassepc/fitnessdroid/data/TrackingService.kt

@@ -32,13 +32,18 @@ import kotlinx.coroutines.flow.StateFlow
 import kotlinx.coroutines.flow.asStateFlow
 import kotlinx.coroutines.launch
 
-/** Spårningens fas: söker GPS-fix innan klockan startar, sen aktiv. */
-enum class TrackingPhase { IDLE, SEARCHING_GPS, ACTIVE }
+/**
+ * Spårningens faser: startar i READY (pausad — GPS värmer upp), play startar
+ * en nedräkning (inställbar) och sen ACTIVE. Kan pausas/återupptas.
+ */
+enum class TrackingPhase { IDLE, READY, COUNTDOWN, ACTIVE, PAUSED }
 
 /** Läget för en pågående (eller nyss avslutad) aktivitetsspårning. */
 data class TrackingState(
     val isActive: Boolean = false,
     val phase: TrackingPhase = TrackingPhase.IDLE,
+    /** Sekunder kvar av nedräkningen (fas COUNTDOWN) */
+    val countdownLeft: Int = 0,
     /** Aktivitetstypen som spåras */
     val typeId: Int = 0,
     val typeKey: String = "",
@@ -50,7 +55,9 @@ data class TrackingState(
     val elapsedSeconds: Int = 0,
     val distanceMeters: Double = 0.0,
     val elevationGainMeters: Double = 0.0,
-    /** Senaste GPS-position (lat, lon) + hela spåret */
+    /** Steg räknade av telefonens sensor under aktiv tid (null = sensor saknas/nekad) */
+    val steps: Int? = null,
+    /** Committade spårpunkter (spikfiltrerade) */
     val points: List<Pair<Double, Double>> = emptyList(),
     /** Senast kända position oavsett kvalitet — för kartcentrering/markör */
     val currentPosition: Pair<Double, Double>? = null,
@@ -63,36 +70,48 @@ data class TrackingState(
 
 /**
  * Foreground-service som spårar en aktivitet: GPS-rutt, distans, höjdmeter,
- * tid och live-kcal. För icke-distansaktiviteter (fäktning m.m.) körs bara
- * timern — ingen GPS. UI:t läser [state]; servicen äger sanningen så
- * spårningen överlever att appen swipas bort från recents.
+ * steg, tid och live-kcal. Positionspipeline: fartgrind (Doppler) →
+ * rörelsevakt (accelerometer) → lag-buffrat spikfilter (en punkt committas
+ * först när nästa setts; "ut-och-tillbaka"-hopp slängs) → stillastående-filter.
  */
 class TrackingService : Service(), LocationListener, SensorEventListener {
 
     private val scope = CoroutineScope(SupervisorJob() + Dispatchers.Default)
     private var locationManager: LocationManager? = null
+    private var sensorManager: SensorManager? = null
 
     private var weightKg: Double? = null
-    private var activeSinceElapsed = 0L
-    private var lastLocation: Location? = null
-    // GPS-filter (justerbara i inställningarna, skickas med vid start)
+    // GPS-filter (justerbara i inställningarna)
     private var accuracyLimitM = 35f
     private var speedFactor = 2.0
     private var speedFloorMs = 12.0 / 3.6
-    // Glidande Doppler-fart (m/s) — GPS:ens egen fartmätning, stabilare än positionerna
-    private var dopplerEmaMs = 0.0
-    private var rejectStreak = 0
-    // Rörelsevakt (accelerometer): står man stilla fryses spår/distans/höjd
-    private var sensorManager: SensorManager? = null
     private var motionGuard = true
     private var motionThreshold = 0.35
-    private val motionWindow = ArrayDeque<Double>()
-    private var isMoving = true
-    private var lastMotionLogged = true
-    // Glidande medel av höjd för att filtrera GPS-brus innan höjdmeter summeras
+    private var countdownSeconds = 3
+
+    // Tidräkning: ackumulerad aktiv tid + när nuvarande aktiva stint började
+    private var accumulatedActiveMs = 0L
+    private var activeSinceElapsed = 0L
+
+    // Positionspipeline
+    private var lastCommitted: Location? = null
+    private var candidate: Location? = null
+    private var dopplerEmaMs = 0.0
+    private var rejectStreak = 0
+
+    // Höjd (glidande medel mot GPS-brus)
     private val altitudeWindow = ArrayDeque<Double>()
     private var smoothedAltitude: Double? = null
 
+    // Rörelsevakt
+    private val motionWindow = ArrayDeque<Double>()
+    private var isMoving = true
+
+    // Steg (TYPE_STEP_COUNTER är kumulativ sedan boot)
+    private var stepSensorAvailable = false
+    private var stepCounterLast: Long = -1
+    private var stepsDuringActivity = 0L
+
     override fun onCreate() {
         super.onCreate()
         createChannel()
@@ -104,8 +123,12 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
                 stopTracking()
                 return START_NOT_STICKY
             }
-            ACTION_START_NOW -> {
-                activate("starta ändå")
+            ACTION_PLAY -> {
+                play()
+                return START_STICKY
+            }
+            ACTION_PAUSE -> {
+                pause()
                 return START_STICKY
             }
             else -> {
@@ -124,15 +147,24 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
         speedFloorMs = intent.getIntExtra(EXTRA_GPS_SPEED_FLOOR, 12) / 3.6
         motionGuard = intent.getBooleanExtra(EXTRA_MOTION_GUARD, true)
         motionThreshold = intent.getDoubleExtra(EXTRA_MOTION_THRESHOLD, 0.35)
+        countdownSeconds = intent.getIntExtra(EXTRA_COUNTDOWN, 3)
+
+        accumulatedActiveMs = 0L
+        activeSinceElapsed = 0L
+        lastCommitted = null
+        candidate = null
         dopplerEmaMs = 0.0
         rejectStreak = 0
+        altitudeWindow.clear()
+        smoothedAltitude = null
         motionWindow.clear()
         isMoving = true
-        lastMotionLogged = true
+        stepCounterLast = -1
+        stepsDuringActivity = 0
 
         _state.value = TrackingState(
             isActive = true,
-            phase = if (distanceBased) TrackingPhase.SEARCHING_GPS else TrackingPhase.ACTIVE,
+            phase = TrackingPhase.READY,
             typeId = intent.getIntExtra(EXTRA_TYPE_ID, 0),
             typeKey = intent.getStringExtra(EXTRA_TYPE_KEY) ?: "",
             typeName = intent.getStringExtra(EXTRA_TYPE_NAME) ?: "Aktivitet",
@@ -142,62 +174,111 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
             startedAtEpochMs = System.currentTimeMillis(),
         )
         TrackLog.clear()
-        TrackLog.log(
-            "start: ${_state.value.typeName} (distans=$distanceBased, vikt=${weightKg ?: "?"} kg)" +
-                if (distanceBased) " — väntar på GPS-fix" else ""
-        )
+        TrackLog.log("start: ${_state.value.typeName} (distans=$distanceBased, vikt=${weightKg ?: "?"} kg) — READY, tryck play")
         if (distanceBased) {
             TrackLog.log(
                 "filter: acc≤${accuracyLimitM.toInt()} m, fartgrind ${speedFactor}× Doppler " +
-                    "(golv ${"%.0f".format(speedFloorMs * 3.6)} km/h)"
+                    "(golv ${"%.0f".format(speedFloorMs * 3.6)} km/h), spikfilter på, nedräkning ${countdownSeconds}s"
             )
         }
 
-        val type = if (distanceBased) {
-            ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION
-        } else {
-            // Timer-läge behöver ingen plats, men servicetypen är deklarerad som location
-            ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION
-        }
-        startForeground(NOTIFICATION_ID, buildNotification(), type)
+        startForeground(
+            NOTIFICATION_ID, buildNotification(),
+            ServiceInfo.FOREGROUND_SERVICE_TYPE_LOCATION,
+        )
 
         if (distanceBased) {
             startGps()
-            if (motionGuard) startMotionGuard()
+            startSensors()
         }
 
-        // Tick: tid + kcal + notis. Klockan räknar från att fasen blev ACTIVE.
+        // Tick: nedräkning, aktiv tid, kcal, notis
         scope.launch {
             while (_state.value.isActive) {
                 val s = _state.value
-                if (s.phase != TrackingPhase.ACTIVE) {
-                    delay(500)
-                    continue
-                }
-                if (activeSinceElapsed == 0L) activeSinceElapsed = SystemClock.elapsedRealtime()
-                val elapsed = ((SystemClock.elapsedRealtime() - activeSinceElapsed) / 1000).toInt()
-                _state.value = s.copy(
-                    elapsedSeconds = elapsed,
-                    kcal = ActivityKcal.estimate(
-                        met = s.met,
-                        category = s.category,
-                        isDistanceBased = s.isDistanceBased,
-                        weightKg = weightKg,
-                        durationSeconds = elapsed,
-                        distanceMeters = s.distanceMeters.takeIf { it > 0 },
-                        elevationGainMeters = s.elevationGainMeters.takeIf { it > 0 },
-                        rpe = null,
-                    ),
-                )
-                if (elapsed % 10 == 0) {
-                    getSystemService(NotificationManager::class.java)
-                        .notify(NOTIFICATION_ID, buildNotification())
+                when (s.phase) {
+                    TrackingPhase.COUNTDOWN -> {
+                        val left = s.countdownLeft - 1
+                        if (left <= 0) {
+                            goActive()
+                        } else {
+                            _state.value = _state.value.copy(countdownLeft = left)
+                        }
+                    }
+                    TrackingPhase.ACTIVE -> {
+                        val elapsed = currentElapsedSeconds()
+                        _state.value = _state.value.copy(
+                            elapsedSeconds = elapsed,
+                            steps = if (stepSensorAvailable) stepsDuringActivity.toInt() else _state.value.steps,
+                            kcal = ActivityKcal.estimate(
+                                met = s.met,
+                                category = s.category,
+                                isDistanceBased = s.isDistanceBased,
+                                weightKg = weightKg,
+                                durationSeconds = elapsed,
+                                distanceMeters = s.distanceMeters.takeIf { it > 0 },
+                                elevationGainMeters = s.elevationGainMeters.takeIf { it > 0 },
+                                rpe = null,
+                            ),
+                        )
+                        if (elapsed % 10 == 0) {
+                            getSystemService(NotificationManager::class.java)
+                                .notify(NOTIFICATION_ID, buildNotification())
+                        }
+                    }
+                    else -> Unit
                 }
                 delay(1000)
             }
         }
     }
 
+    private fun currentElapsedSeconds(): Int {
+        val extra = if (_state.value.phase == TrackingPhase.ACTIVE && activeSinceElapsed > 0) {
+            SystemClock.elapsedRealtime() - activeSinceElapsed
+        } else 0L
+        return ((accumulatedActiveMs + extra) / 1000).toInt()
+    }
+
+    private fun play() {
+        val s = _state.value
+        if (!s.isActive || s.phase == TrackingPhase.ACTIVE || s.phase == TrackingPhase.COUNTDOWN) return
+        if (countdownSeconds > 0) {
+            TrackLog.log("play → nedräkning ${countdownSeconds}s")
+            _state.value = s.copy(phase = TrackingPhase.COUNTDOWN, countdownLeft = countdownSeconds)
+        } else {
+            goActive()
+        }
+    }
+
+    private fun goActive() {
+        activeSinceElapsed = SystemClock.elapsedRealtime()
+        stepCounterLast = -1 // ny baslinje vid nästa sensoravläsning
+        TrackLog.log("AKTIV — klockan går")
+        _state.value = _state.value.copy(
+            phase = TrackingPhase.ACTIVE,
+            countdownLeft = 0,
+            startedAtEpochMs = if (accumulatedActiveMs == 0L) System.currentTimeMillis()
+            else _state.value.startedAtEpochMs,
+        )
+        getSystemService(NotificationManager::class.java).notify(NOTIFICATION_ID, buildNotification())
+    }
+
+    private fun pause() {
+        val s = _state.value
+        if (!s.isActive || s.phase != TrackingPhase.ACTIVE) return
+        accumulatedActiveMs += SystemClock.elapsedRealtime() - activeSinceElapsed
+        activeSinceElapsed = 0L
+        // Positionskedjan bryts så pausvandring inte räknas vid återupptag
+        lastCommitted = null
+        candidate = null
+        TrackLog.log("pausad vid ${currentElapsedSeconds()}s, ${"%.0f".format(s.distanceMeters)} m")
+        _state.value = s.copy(phase = TrackingPhase.PAUSED, elapsedSeconds = (accumulatedActiveMs / 1000).toInt())
+        getSystemService(NotificationManager::class.java).notify(NOTIFICATION_ID, buildNotification())
+    }
+
+    /* ---------- GPS ---------- */
+
     private fun startGps() {
         if (ContextCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)
             != PackageManager.PERMISSION_GRANTED
@@ -208,8 +289,6 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
         val lm = getSystemService(Context.LOCATION_SERVICE) as LocationManager
         locationManager = lm
 
-        // Billiga telefoner levererar ofta bara via fused/network — lyssna på
-        // allt som finns och filtrera på noggrannhet istället för provider.
         val providers = listOf(
             LocationManager.GPS_PROVIDER,
             LocationManager.FUSED_PROVIDER,
@@ -221,94 +300,49 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
             TrackLog.log("provider $provider: ${if (!exists) "saknas" else if (enabled) "på" else "AVSTÄNGD"}")
             if (!enabled) continue
             runCatching {
-                lm.requestLocationUpdates(provider, 2000L, 0f, this, Looper.getMainLooper())
-                TrackLog.log("lyssnar på $provider (2 s)")
+                // 1 s / 0 m — tät sampling ger spikfiltret mer att jobba med
+                lm.requestLocationUpdates(provider, 1000L, 0f, this, Looper.getMainLooper())
+                TrackLog.log("lyssnar på $provider (1 s)")
             }.onFailure { TrackLog.log("FEL: kunde inte lyssna på $provider: ${it.message}") }
         }
 
-        // Senast kända position → omedelbar kartcentrering (läggs inte i spåret)
         providers.firstNotNullOfOrNull { p ->
             runCatching { lm.getLastKnownLocation(p) }.getOrNull()
         }?.let { last ->
             TrackLog.log("lastKnown: ${last.provider} acc=${if (last.hasAccuracy()) "%.0f".format(last.accuracy) else "?"} m")
-            _state.value = _state.value.copy(
-                currentPosition = last.latitude to last.longitude,
-            )
+            _state.value = _state.value.copy(currentPosition = last.latitude to last.longitude)
         }
     }
 
-    private fun startMotionGuard() {
-        val sm = getSystemService(Context.SENSOR_SERVICE) as SensorManager
-        sensorManager = sm
-        val accel = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)
-        if (accel == null) {
-            TrackLog.log("rörelsevakt: ingen accelerometer — avstängd")
-            motionGuard = false
-            return
-        }
-        sm.registerListener(this, accel, SensorManager.SENSOR_DELAY_UI)
-        TrackLog.log("rörelsevakt: på (tröskel ${motionThreshold} m/s²)")
-    }
-
-    override fun onSensorChanged(event: SensorEvent) {
-        if (event.sensor.type != Sensor.TYPE_ACCELEROMETER) return
-        val x = event.values[0].toDouble()
-        val y = event.values[1].toDouble()
-        val z = event.values[2].toDouble()
-        // Avvikelse från vilomagnituden (gravitationen) — steg ger tydliga utslag
-        val deviation = kotlin.math.abs(kotlin.math.sqrt(x * x + y * y + z * z) - 9.81)
-        motionWindow.addLast(deviation)
-        if (motionWindow.size > 20) motionWindow.removeFirst()  // ~4 s vid UI-takt
-        if (motionWindow.size < 8) return
-
-        val avg = motionWindow.average()
-        val moving = avg > motionThreshold
-        if (moving != isMoving) {
-            isMoving = moving
-            _state.value = _state.value.copy(isMoving = moving)
-            if (moving != lastMotionLogged) {
-                TrackLog.log("rörelsevakt: ${if (moving) "i rörelse" else "stilla"} (nivå ${"%.2f".format(avg)})")
-                lastMotionLogged = moving
-            }
-        }
-    }
-
-    override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) = Unit
-
-    /** Gå från GPS-sökning till aktiv (klockan börjar ticka). */
-    private fun activate(reason: String) {
-        val s = _state.value
-        if (!s.isActive || s.phase == TrackingPhase.ACTIVE) return
-        TrackLog.log("aktiverad ($reason)")
-        _state.value = s.copy(
-            phase = TrackingPhase.ACTIVE,
-            startedAtEpochMs = System.currentTimeMillis(),
-        )
-    }
-
     override fun onLocationChanged(location: Location) {
         val s = _state.value
         if (!s.isActive || !s.isDistanceBased) return
         val acc = if (location.hasAccuracy()) location.accuracy else -1f
 
-        // Position för kartan uppdateras alltid, oavsett kvalitet
-        _state.value = _state.value.copy(currentPosition = location.latitude to location.longitude)
+        // Position för kartan uppdateras alltid, oavsett kvalitet och fas
+        _state.value = _state.value.copy(
+            currentPosition = location.latitude to location.longitude,
+            gpsFix = true,
+            currentSpeedKmh = if (location.hasSpeed()) location.speed * 3.6 else _state.value.currentSpeedKmh,
+        )
 
-        // Grind 1: spårpunkter kräver hygglig noggrannhet
+        // Ackumulering sker bara i ACTIVE
+        if (s.phase != TrackingPhase.ACTIVE) return
+
+        // Grind 1: noggrannhet
         if (location.hasAccuracy() && location.accuracy > accuracyLimitM) {
             TrackLog.log("${location.provider}: förkastad, acc=${"%.0f".format(acc)} m (>${accuracyLimitM.toInt()})")
             return
         }
 
-        // Uppdatera glidande Doppler-fart (GPS:ens fartmätning via frekvensskift)
+        // Doppler-fart (glidande medel)
         if (location.hasSpeed()) {
             dopplerEmaMs = if (dopplerEmaMs == 0.0) location.speed.toDouble()
             else 0.7 * dopplerEmaMs + 0.3 * location.speed
         }
 
-        // Grind 2 (fartgrinden): en ny position som skulle kräva högre fart än
-        // speedFactor × Doppler-farten är orimlig — GPS-hopp, inte förflyttning.
-        lastLocation?.let { prev ->
+        // Grind 2: fartgrinden mot senast committade punkt
+        lastCommitted?.let { prev ->
             val dtSec = (location.elapsedRealtimeNanos - prev.elapsedRealtimeNanos) / 1e9
             if (dtSec > 0.3) {
                 val jump = prev.distanceTo(location).toDouble()
@@ -317,14 +351,13 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
                 if (impliedMs > allowedMs) {
                     rejectStreak++
                     TrackLog.log(
-                        "${location.provider}: fartgrind — hopp ${"%.0f".format(jump)} m på ${"%.1f".format(dtSec)} s " +
-                            "= ${"%.1f".format(impliedMs * 3.6)} km/h (tillåtet ${"%.1f".format(allowedMs * 3.6)}), förkastad ($rejectStreak)"
+                        "${location.provider}: fartgrind — ${"%.0f".format(jump)} m/${"%.1f".format(dtSec)} s " +
+                            "= ${"%.0f".format(impliedMs * 3.6)} km/h (max ${"%.0f".format(allowedMs * 3.6)}), förkastad ($rejectStreak)"
                     )
-                    // Många orimliga i rad = det är NYA positionen som är sann
-                    // (t.ex. efter tunnel) — sätt ny baslinje utan att räkna distans.
                     if (rejectStreak >= 4) {
                         TrackLog.log("fartgrind: ny baslinje efter $rejectStreak förkastade")
-                        lastLocation = location
+                        lastCommitted = location
+                        candidate = null
                         rejectStreak = 0
                     }
                     return
@@ -333,68 +366,151 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
         }
         rejectStreak = 0
 
-        // Rörelsevakten: stilla ⇒ uppdatera bara kartpositionen, frys resten.
-        // GPS-drift när man står still blir annars fejkdistans/-spår/-höjdmeter.
+        // Grind 3: rörelsevakten — stilla ⇒ frys allt utom kartposition
         if (motionGuard && !isMoving) {
-            lastLocation = location
+            lastCommitted = location
+            candidate = null
             return
         }
 
-        TrackLog.log(
-            "${location.provider}: fix acc=${"%.0f".format(acc)} m" +
-                " alt=${if (location.hasAltitude()) "%.0f".format(location.altitude) else "?"}" +
-                " fart=${if (location.hasSpeed()) "%.1f".format(location.speed * 3.6) else "?"} km/h"
-        )
-        if (s.phase == TrackingPhase.SEARCHING_GPS) activate("fix från ${location.provider}")
-
-        var distance = s.distanceMeters
-        var elevGain = s.elevationGainMeters
-
-        var acceptedAsMovement = true
-        lastLocation?.let { prev ->
-            val d = prev.distanceTo(location).toDouble()
-            // Grind 3 (stillastående): vandring mindre än halva noggrannheten
-            // är brus, inte förflyttning — räkna varken distans eller spårpunkt.
-            val minMove = maxOf(2.0, (if (location.hasAccuracy()) location.accuracy else 5f) * 0.5)
-            if (d >= minMove) distance += d else acceptedAsMovement = false
+        // Grind 4: lag-buffrat spikfilter — committa kandidaten först när vi
+        // sett nästa punkt; "ut-och-direkt-tillbaka" slängs (triangel-kollaps).
+        val prev = lastCommitted
+        val cand = candidate
+        if (prev == null) {
+            lastCommitted = location
+            commitPoint(location, addDistance = 0.0)
+            return
+        }
+        if (cand == null) {
+            candidate = location
+            return
         }
 
+        val d1 = prev.distanceTo(cand).toDouble()
+        val d2 = cand.distanceTo(location).toDouble()
+        val d02 = prev.distanceTo(location).toDouble()
+        val isSpike = d1 > 4.0 && (d1 + d2) > 0 && d02 < 0.6 * (d1 + d2)
+        if (isSpike) {
+            TrackLog.log("spikfilter: slängde punkt (ut ${"%.0f".format(d1)} m, tillbaka ${"%.0f".format(d2)} m, direkt ${"%.0f".format(d02)} m)")
+            candidate = location
+            return
+        }
+
+        // Kandidaten är trovärdig — committa den
+        val minMove = maxOf(2.0, (if (cand.hasAccuracy()) cand.accuracy else 5f) * 0.5)
+        commitPoint(cand, addDistance = if (d1 >= minMove) d1 else 0.0)
+        lastCommitted = cand
+        candidate = location
+    }
+
+    private fun commitPoint(location: Location, addDistance: Double) {
+        var elevGain = _state.value.elevationGainMeters
         if (location.hasAltitude()) {
             altitudeWindow.addLast(location.altitude)
             if (altitudeWindow.size > 5) altitudeWindow.removeFirst()
             val avg = altitudeWindow.average()
             smoothedAltitude?.let { prevAlt ->
                 val delta = avg - prevAlt
-                // Bara tydliga stigningar räknas som höjdmeter
                 if (delta > 1.0) elevGain += delta
             }
             smoothedAltitude = avg
         }
 
-        lastLocation = location
-        // Utgå från AKTUELLT state (inte snapshotet från funktionens start) —
-        // annars skrivs t.ex. fasbytet till ACTIVE över och klockan står still.
         val cur = _state.value
         _state.value = cur.copy(
-            distanceMeters = distance,
+            distanceMeters = cur.distanceMeters + addDistance,
             elevationGainMeters = elevGain,
-            points = if (acceptedAsMovement || cur.points.isEmpty()) {
+            points = if (addDistance > 0 || cur.points.isEmpty()) {
                 cur.points + (location.latitude to location.longitude)
             } else cur.points,
-            currentSpeedKmh = if (location.hasSpeed()) location.speed * 3.6 else null,
-            gpsFix = true,
         )
     }
 
+    /* ---------- Sensorer (rörelsevakt + steg) ---------- */
+
+    private fun startSensors() {
+        val sm = getSystemService(Context.SENSOR_SERVICE) as SensorManager
+        sensorManager = sm
+        if (motionGuard) {
+            val accel = sm.getDefaultSensor(Sensor.TYPE_ACCELEROMETER)
+            if (accel != null) {
+                sm.registerListener(this, accel, SensorManager.SENSOR_DELAY_UI)
+                TrackLog.log("rörelsevakt: på (tröskel $motionThreshold m/s²)")
+            } else {
+                TrackLog.log("rörelsevakt: ingen accelerometer — avstängd")
+                motionGuard = false
+            }
+        }
+        // Stegsensorn kräver ACTIVITY_RECOGNITION-behörighet (Android 10+)
+        val hasActivityPermission = ContextCompat.checkSelfPermission(
+            this, Manifest.permission.ACTIVITY_RECOGNITION,
+        ) == PackageManager.PERMISSION_GRANTED
+        val stepSensor = sm.getDefaultSensor(Sensor.TYPE_STEP_COUNTER)
+        if (stepSensor != null && hasActivityPermission) {
+            stepSensorAvailable = true
+            sm.registerListener(this, stepSensor, SensorManager.SENSOR_DELAY_UI)
+            TrackLog.log("stegsensor: på")
+        } else {
+            stepSensorAvailable = false
+            TrackLog.log("stegsensor: ${if (stepSensor == null) "saknas" else "behörighet saknas"}")
+        }
+    }
+
+    override fun onSensorChanged(event: SensorEvent) {
+        when (event.sensor.type) {
+            Sensor.TYPE_ACCELEROMETER -> {
+                val x = event.values[0].toDouble()
+                val y = event.values[1].toDouble()
+                val z = event.values[2].toDouble()
+                val deviation = kotlin.math.abs(kotlin.math.sqrt(x * x + y * y + z * z) - 9.81)
+                motionWindow.addLast(deviation)
+                if (motionWindow.size > 20) motionWindow.removeFirst()
+                if (motionWindow.size < 8) return
+                val moving = motionWindow.average() > motionThreshold
+                if (moving != isMoving) {
+                    isMoving = moving
+                    _state.value = _state.value.copy(isMoving = moving)
+                    TrackLog.log("rörelsevakt: ${if (moving) "i rörelse" else "stilla"} (nivå ${"%.2f".format(motionWindow.average())})")
+                }
+            }
+            Sensor.TYPE_STEP_COUNTER -> {
+                val counter = event.values[0].toLong()
+                if (_state.value.phase == TrackingPhase.ACTIVE) {
+                    if (stepCounterLast >= 0 && counter > stepCounterLast) {
+                        stepsDuringActivity += counter - stepCounterLast
+                    }
+                    stepCounterLast = counter
+                } else {
+                    // följ med räknaren utanför ACTIVE utan att ackumulera
+                    stepCounterLast = counter
+                }
+            }
+        }
+    }
+
+    override fun onAccuracyChanged(sensor: Sensor?, accuracy: Int) = Unit
+
+    /* ---------- Stopp & städning ---------- */
+
     private fun stopTracking() {
-        sensorManager?.unregisterListener(this)
+        // Räkna in pågående aktiv stint
+        if (_state.value.phase == TrackingPhase.ACTIVE && activeSinceElapsed > 0) {
+            accumulatedActiveMs += SystemClock.elapsedRealtime() - activeSinceElapsed
+            activeSinceElapsed = 0L
+        }
         val s = _state.value
         TrackLog.log(
-            "stopp: ${s.elapsedSeconds}s, ${"%.0f".format(s.distanceMeters)} m, " +
-                "+${"%.0f".format(s.elevationGainMeters)} hm, ${s.points.size} punkter, kcal=${s.kcal?.toInt() ?: "?"}"
+            "stopp: ${(accumulatedActiveMs / 1000)}s aktiv tid, ${"%.0f".format(s.distanceMeters)} m, " +
+                "+${"%.0f".format(s.elevationGainMeters)} hm, ${s.points.size} punkter, " +
+                "steg=${s.steps ?: "?"}, kcal=${s.kcal?.toInt() ?: "?"}"
         )
+        sensorManager?.unregisterListener(this)
         locationManager?.removeUpdates(this)
-        _state.value = _state.value.copy(isActive = false)
+        _state.value = _state.value.copy(
+            isActive = false,
+            elapsedSeconds = (accumulatedActiveMs / 1000).toInt(),
+        )
         stopForeground(STOP_FOREGROUND_REMOVE)
         stopSelf()
     }
@@ -409,6 +525,8 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
 
     override fun onBind(intent: Intent?) = null
 
+    /* ---------- Notis ---------- */
+
     private fun createChannel() {
         val channel = NotificationChannel(
             CHANNEL_ID, "Aktivitetsspårning", NotificationManager.IMPORTANCE_LOW,
@@ -423,10 +541,14 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
             Intent(this, MainActivity::class.java),
             PendingIntent.FLAG_IMMUTABLE,
         )
-        val text = buildString {
-            append(formatElapsed(s.elapsedSeconds))
-            if (s.isDistanceBased) append(" · ${"%.2f".format(s.distanceMeters / 1000)} km")
-            s.kcal?.let { append(" · ${it.toInt()} kcal") }
+        val text = when (s.phase) {
+            TrackingPhase.READY -> "Redo — tryck play i appen"
+            TrackingPhase.PAUSED -> "Pausad · ${formatElapsed(s.elapsedSeconds)}"
+            else -> buildString {
+                append(formatElapsed(s.elapsedSeconds))
+                if (s.isDistanceBased) append(" · ${"%.2f".format(s.distanceMeters / 1000)} km")
+                s.kcal?.let { append(" · ${it.toInt()} kcal") }
+            }
         }
         return NotificationCompat.Builder(this, CHANNEL_ID)
             .setSmallIcon(android.R.drawable.ic_menu_mylocation)
@@ -450,7 +572,8 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
         private const val NOTIFICATION_ID = 44
 
         const val ACTION_STOP = "eu.brassepc.fitnessdroid.TRACKING_STOP"
-        const val ACTION_START_NOW = "eu.brassepc.fitnessdroid.TRACKING_START_NOW"
+        const val ACTION_PLAY = "eu.brassepc.fitnessdroid.TRACKING_PLAY"
+        const val ACTION_PAUSE = "eu.brassepc.fitnessdroid.TRACKING_PAUSE"
         const val EXTRA_TYPE_ID = "typeId"
         const val EXTRA_TYPE_KEY = "typeKey"
         const val EXTRA_TYPE_NAME = "typeName"
@@ -463,6 +586,7 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
         const val EXTRA_GPS_SPEED_FLOOR = "gpsSpeedFloor"
         const val EXTRA_MOTION_GUARD = "motionGuard"
         const val EXTRA_MOTION_THRESHOLD = "motionThreshold"
+        const val EXTRA_COUNTDOWN = "countdownSeconds"
 
         private val _state = MutableStateFlow(TrackingState())
         /** Läses av UI:t — servicen äger sanningen. */
@@ -477,6 +601,7 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
             gpsSpeedFloorKmh: Int = 12,
             motionGuardEnabled: Boolean = true,
             motionThreshold: Double = 0.35,
+            countdownSeconds: Int = 3,
         ) {
             val intent = Intent(context, TrackingService::class.java).apply {
                 putExtra(EXTRA_TYPE_ID, type.id)
@@ -491,21 +616,27 @@ class TrackingService : Service(), LocationListener, SensorEventListener {
                 putExtra(EXTRA_GPS_SPEED_FLOOR, gpsSpeedFloorKmh)
                 putExtra(EXTRA_MOTION_GUARD, motionGuardEnabled)
                 putExtra(EXTRA_MOTION_THRESHOLD, motionThreshold)
+                putExtra(EXTRA_COUNTDOWN, countdownSeconds)
             }
             context.startForegroundService(intent)
         }
 
+        fun play(context: Context) {
+            context.startService(
+                Intent(context, TrackingService::class.java).apply { action = ACTION_PLAY }
+            )
+        }
+
+        fun pause(context: Context) {
+            context.startService(
+                Intent(context, TrackingService::class.java).apply { action = ACTION_PAUSE }
+            )
+        }
+
         fun stop(context: Context) {
             context.startService(
                 Intent(context, TrackingService::class.java).apply { action = ACTION_STOP }
             )
         }
-
-        /** "Starta ändå" — börja räkna tid utan att vänta på GPS-fixen. */
-        fun startNow(context: Context) {
-            context.startService(
-                Intent(context, TrackingService::class.java).apply { action = ACTION_START_NOW }
-            )
-        }
     }
 }

app/src/main/java/eu/brassepc/fitnessdroid/ui/activities/ActivitiesScreen.kt

@@ -6,6 +6,7 @@ import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
 import androidx.compose.foundation.layout.fillMaxSize
 import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.items
@@ -16,6 +17,7 @@ import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.filled.Add
 import androidx.compose.material.icons.filled.Favorite
+import androidx.compose.material.icons.filled.Map
 import androidx.compose.material.icons.filled.PlayArrow
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
@@ -38,6 +40,7 @@ import androidx.compose.runtime.remember
 import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.graphics.toArgb
 import androidx.compose.ui.text.font.FontWeight
 import androidx.compose.ui.text.input.KeyboardType
 import androidx.compose.ui.unit.dp
@@ -208,6 +211,11 @@ fun ActivitiesScreen(
     var showLog by remember { mutableStateOf(false) }
     var showStartPicker by remember { mutableStateOf(false) }
     var editTarget by remember { mutableStateOf<Activity?>(null) }
+    var mapTarget by remember { mutableStateOf<Activity?>(null) }
+
+    mapTarget?.let { a ->
+        RouteMapDialog(activity = a, onDismiss = { mapTarget = null })
+    }
 
     // Uppdatera listan när man kommer tillbaka (t.ex. efter avslutad spårning)
     androidx.compose.runtime.LaunchedEffect(Unit) { viewModel.load() }
@@ -323,7 +331,13 @@ fun ActivitiesScreen(
                     }
                 }
                 items(activities, key = { it.id }) { a ->
-                    ActivityRow(a, onClick = { editTarget = a })
+                    ActivityRow(
+                        a,
+                        onClick = { editTarget = a },
+                        onShowMap = if (a.routePolyline != null) {
+                            { mapTarget = a }
+                        } else null,
+                    )
                 }
             }
         }
@@ -398,7 +412,7 @@ fun TypePickerDialog(
 }
 
 @Composable
-private fun ActivityRow(a: Activity, onClick: () -> Unit) {
+private fun ActivityRow(a: Activity, onClick: () -> Unit, onShowMap: (() -> Unit)? = null) {
     Card(modifier = Modifier.fillMaxWidth().clickable(onClick = onClick)) {
         Row(
             modifier = Modifier.padding(horizontal = 14.dp, vertical = 10.dp),
@@ -436,10 +450,68 @@ private fun ActivityRow(a: Activity, onClick: () -> Unit) {
                     fontWeight = FontWeight.Bold,
                 )
             }
+            onShowMap?.let {
+                androidx.compose.material3.IconButton(onClick = it) {
+                    Icon(
+                        Icons.Filled.Map,
+                        contentDescription = "Visa rutt",
+                        tint = MaterialTheme.colorScheme.primary,
+                    )
+                }
+            }
         }
     }
 }
 
+/** Fullskärmsdialog med rutten på en OSM-karta (osmdroid). */
+@Composable
+fun RouteMapDialog(activity: Activity, onDismiss: () -> Unit) {
+    val points = remember(activity.id) {
+        activity.routePolyline?.let { eu.brassepc.fitnessdroid.data.decodePolyline(it) } ?: emptyList()
+    }
+    AlertDialog(
+        onDismissRequest = onDismiss,
+        title = {
+            Text("${activity.activityType.nameSv} · ${activity.startedAt.take(10)}")
+        },
+        text = {
+            if (points.size < 2) {
+                Text("Ingen rutt sparad för den här aktiviteten.")
+            } else {
+                val lineColor = MaterialTheme.colorScheme.primary.toArgb()
+                androidx.compose.ui.viewinterop.AndroidView(
+                    factory = { ctx ->
+                        org.osmdroid.config.Configuration.getInstance().apply {
+                            userAgentValue = "FitnessDroid"
+                            osmdroidBasePath = java.io.File(ctx.cacheDir, "osmdroid")
+                            osmdroidTileCache = java.io.File(ctx.cacheDir, "osmdroid/tiles")
+                        }
+                        org.osmdroid.views.MapView(ctx).apply {
+                            setTileSource(org.osmdroid.tileprovider.tilesource.TileSourceFactory.MAPNIK)
+                            setMultiTouchControls(true)
+                            val line = org.osmdroid.views.overlay.Polyline().apply {
+                                outlinePaint.color = lineColor
+                                outlinePaint.strokeWidth = 10f
+                                setPoints(points.map { (lat, lon) -> org.osmdroid.util.GeoPoint(lat, lon) })
+                            }
+                            overlays.add(line)
+                            post {
+                                zoomToBoundingBox(line.bounds.increaseByScale(1.3f), false)
+                            }
+                        }
+                    },
+                    modifier = Modifier
+                        .fillMaxWidth()
+                        .height(380.dp),
+                )
+            }
+        },
+        confirmButton = {
+            TextButton(onClick = onDismiss) { Text("Stäng") }
+        },
+    )
+}
+
 private fun formatDuration(sec: Int): String {
     val h = sec / 3600
     val m = (sec % 3600) / 60

app/src/main/java/eu/brassepc/fitnessdroid/ui/settings/SettingsScreen.kt

@@ -106,6 +106,9 @@ class SettingsViewModel(
         store.setGpsSpeedFloor(settings.value.gpsSpeedFloorKmh + delta)
     }
     fun setMotionGuard(value: Boolean) = viewModelScope.launch { store.setMotionGuardEnabled(value) }
+    fun adjustCountdown(delta: Int) = viewModelScope.launch {
+        store.setCountdownSeconds(settings.value.countdownSeconds + delta)
+    }
     fun adjustMotionThreshold(delta: Double) = viewModelScope.launch {
         store.setMotionThreshold(settings.value.motionThreshold + delta)
     }
@@ -274,6 +277,12 @@ fun SettingsScreen(
                     onMinus = { viewModel.adjustGpsSpeedFloor(-2) },
                     onPlus = { viewModel.adjustGpsSpeedFloor(2) },
                 )
+                StepperRow(
+                    label = "Nedräkning vid start",
+                    value = "${settings.countdownSeconds} s",
+                    onMinus = { viewModel.adjustCountdown(-1) },
+                    onPlus = { viewModel.adjustCountdown(1) },
+                )
                 Row(
                     modifier = Modifier
                         .fillMaxWidth()

app/src/main/java/eu/brassepc/fitnessdroid/ui/track/TrackScreen.kt

@@ -18,6 +18,8 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
 import androidx.compose.material.icons.automirrored.filled.ArrowBack
 import androidx.compose.material.icons.filled.Favorite
+import androidx.compose.material.icons.filled.Pause
+import androidx.compose.material.icons.filled.PlayArrow
 import androidx.compose.material.icons.filled.Stop
 import androidx.compose.material3.AlertDialog
 import androidx.compose.material3.Button
@@ -119,6 +121,7 @@ class TrackViewModel(
                 gpsSpeedFloorKmh = cfg.gpsSpeedFloorKmh,
                 motionGuardEnabled = cfg.motionGuardEnabled,
                 motionThreshold = cfg.motionThreshold,
+                countdownSeconds = cfg.countdownSeconds,
             )
         }
     }
@@ -134,7 +137,11 @@ class TrackViewModel(
             val startedIso = Instant.ofEpochMilli(s.startedAtEpochMs).toString()
             val distance = s.distanceMeters.takeIf { s.isDistanceBased && it > 10 }
             val elevation = s.elevationGainMeters.takeIf { s.isDistanceBased && it > 1 }
-            val polyline = s.points.takeIf { it.size >= 2 }?.let { encodePolyline(it) }
+            // Banta rutten före sparning — Douglas-Peucker 4 m + tak 800 punkter
+            val polyline = s.points.takeIf { it.size >= 2 }
+                ?.let { eu.brassepc.fitnessdroid.data.simplifyRoute(it) }
+                ?.let { if (it.size > 800) it.filterIndexed { i, _ -> i % (it.size / 800 + 1) == 0 } else it }
+                ?.let { encodePolyline(it) }
             try {
                 gymApi.addActivity(
                     activityTypeId = overrideTypeId ?: s.typeId,
@@ -145,6 +152,7 @@ class TrackViewModel(
                     rpe = rpe,
                     source = "tracked",
                     routePolyline = polyline,
+                    steps = s.steps?.takeIf { it > 0 },
                 )
                 saved.value = true
                 message.value = null
@@ -228,6 +236,8 @@ fun TrackScreen(
             if (type.isDistanceBased) {
                 add(Manifest.permission.ACCESS_FINE_LOCATION)
                 add(Manifest.permission.ACCESS_COARSE_LOCATION)
+                // Stegsensorn (valfri — nekas den blir stegen bara tomma)
+                add(Manifest.permission.ACTIVITY_RECOGNITION)
             }
             // POST_NOTIFICATIONS finns först i Android 13 (API 33)
             if (android.os.Build.VERSION.SDK_INT >= 33) {
@@ -337,7 +347,8 @@ fun TrackScreen(
                 else -> LiveContent(
                     tracking = tracking,
                     onStop = { viewModel.stop(context) },
-                    onStartAnyway = { TrackingService.startNow(context) },
+                    onPlay = { TrackingService.play(context) },
+                    onPause = { TrackingService.pause(context) },
                     showLog = logEnabled,
                 )
             }
@@ -349,7 +360,8 @@ fun TrackScreen(
 private fun LiveContent(
     tracking: TrackingState,
     onStop: () -> Unit,
-    onStartAnyway: () -> Unit,
+    onPlay: () -> Unit,
+    onPause: () -> Unit,
     showLog: Boolean,
 ) {
     Column(modifier = Modifier.fillMaxSize()) {
@@ -387,32 +399,41 @@ private fun LiveContent(
                 modifier = Modifier.padding(14.dp),
                 verticalArrangement = Arrangement.spacedBy(10.dp),
             ) {
-                if (tracking.phase == TrackingPhase.SEARCHING_GPS) {
-                    Row(verticalAlignment = Alignment.CenterVertically) {
-                        CircularProgressIndicator(
-                            modifier = Modifier.padding(end = 10.dp).size(18.dp),
-                            strokeWidth = 2.dp,
-                        )
+                when (tracking.phase) {
+                    TrackingPhase.READY -> Row(verticalAlignment = Alignment.CenterVertically) {
                         Column(modifier = Modifier.weight(1f)) {
-                            Text("Söker GPS…", style = MaterialTheme.typography.titleSmall)
+                            Text("Redo att starta", style = MaterialTheme.typography.titleSmall)
                             Text(
-                                "Klockan startar vid första fixen — gå gärna ut i det fria.",
+                                if (tracking.isDistanceBased && !tracking.gpsFix)
+                                    "GPS söker — vänta gärna på fix, eller kör igång direkt."
+                                else "Tryck play när du är redo.",
                                 style = MaterialTheme.typography.bodySmall,
                                 color = MaterialTheme.colorScheme.onSurfaceVariant,
                             )
                         }
-                        TextButton(onClick = onStartAnyway) { Text("Starta ändå") }
                     }
+                    TrackingPhase.COUNTDOWN -> Row(
+                        modifier = Modifier.fillMaxWidth(),
+                        horizontalArrangement = Arrangement.Center,
+                    ) {
+                        Text(
+                            "${tracking.countdownLeft}",
+                            style = MaterialTheme.typography.displayLarge,
+                            color = MaterialTheme.colorScheme.primary,
+                        )
+                    }
+                    TrackingPhase.PAUSED -> Text(
+                        "Pausad — tryck play för att fortsätta",
+                        style = MaterialTheme.typography.titleSmall,
+                        color = MaterialTheme.colorScheme.onSurfaceVariant,
+                    )
+                    else -> Unit
                 }
                 Row(modifier = Modifier.fillMaxWidth()) {
                     StatBox("Tid", formatElapsed(tracking.elapsedSeconds), Modifier.weight(1f))
                     if (tracking.isDistanceBased) {
                         StatBox("Distans", "${(tracking.distanceMeters / 1000).compact()} km", Modifier.weight(1f))
-                        StatBox(
-                            "Fart",
-                            tracking.currentSpeedKmh?.let { "${it.compact()} km/h" } ?: "—",
-                            Modifier.weight(1f),
-                        )
+                        StatBox("Steg", tracking.steps?.toString() ?: "—", Modifier.weight(1f))
                     }
                     StatBox("Kcal", tracking.kcal?.toInt()?.toString() ?: "—", Modifier.weight(1f))
                 }
@@ -427,6 +448,11 @@ private fun LiveContent(
                             } else "—",
                             Modifier.weight(1f),
                         )
+                        StatBox(
+                            "Fart",
+                            tracking.currentSpeedKmh?.let { "${it.compact()} km/h" } ?: "—",
+                            Modifier.weight(1f),
+                        )
                         StatBox(
                             "GPS",
                             when {
@@ -438,16 +464,42 @@ private fun LiveContent(
                         )
                     }
                 }
-                Button(
-                    onClick = onStop,
-                    modifier = Modifier.fillMaxWidth(),
-                    colors = androidx.compose.material3.ButtonDefaults.buttonColors(
-                        containerColor = MaterialTheme.colorScheme.error,
-                        contentColor = MaterialTheme.colorScheme.onError,
-                    ),
-                ) {
-                    Icon(Icons.Default.Stop, contentDescription = null)
-                    Text("Avsluta aktiviteten", modifier = Modifier.padding(start = 6.dp))
+                Row(horizontalArrangement = Arrangement.spacedBy(10.dp)) {
+                    when (tracking.phase) {
+                        TrackingPhase.READY, TrackingPhase.PAUSED -> Button(
+                            onClick = onPlay,
+                            modifier = Modifier.weight(1f),
+                        ) {
+                            Icon(Icons.Default.PlayArrow, contentDescription = null)
+                            Text(
+                                if (tracking.phase == TrackingPhase.PAUSED) "Fortsätt" else "Starta",
+                                modifier = Modifier.padding(start = 6.dp),
+                            )
+                        }
+                        TrackingPhase.ACTIVE -> Button(
+                            onClick = onPause,
+                            modifier = Modifier.weight(1f),
+                            colors = androidx.compose.material3.ButtonDefaults.buttonColors(
+                                containerColor = MaterialTheme.colorScheme.secondary,
+                                contentColor = MaterialTheme.colorScheme.onSecondary,
+                            ),
+                        ) {
+                            Icon(Icons.Default.Pause, contentDescription = null)
+                            Text("Pausa", modifier = Modifier.padding(start = 6.dp))
+                        }
+                        else -> Unit
+                    }
+                    Button(
+                        onClick = onStop,
+                        modifier = Modifier.weight(1f),
+                        colors = androidx.compose.material3.ButtonDefaults.buttonColors(
+                            containerColor = MaterialTheme.colorScheme.error,
+                            contentColor = MaterialTheme.colorScheme.onError,
+                        ),
+                    ) {
+                        Icon(Icons.Default.Stop, contentDescription = null)
+                        Text("Avsluta", modifier = Modifier.padding(start = 6.dp))
+                    }
                 }
                 if (showLog) TechLogSection()
             }
@@ -623,6 +675,7 @@ private fun SummaryContent(
                         SummaryRow("Snittfart", "${kmh.compact()} km/h")
                     }
                 }
+                summary.steps?.takeIf { it > 0 }?.let { SummaryRow("Steg", "$it") }
                 summary.kcal?.let { SummaryRow("Kcal (preliminärt)", "${it.toInt()}") }
 
                 guessKey?.let {