diff --git a/app/build.gradle.kts b/app/build.gradle.kts
index f09ad7a..cac4cd8 100644
--- a/app/build.gradle.kts
+++ b/app/build.gradle.kts
@@ -29,7 +29,7 @@ android {
         minSdk = 31
         targetSdk = 35
         versionCode = ciRunNumber ?: 1
-        versionName = "0.4.0" + (ciRunNumber?.let { "+build.$it" } ?: "-dev")
+        versionName = "0.5.0" + (ciRunNumber?.let { "+build.$it" } ?: "-dev")
     }
 
     signingConfigs {
diff --git a/app/src/main/java/eu/brassepc/fitnessdroid/data/Bmr.kt b/app/src/main/java/eu/brassepc/fitnessdroid/data/Bmr.kt
new file mode 100644
index 0000000..68e8fc0
--- /dev/null
+++ b/app/src/main/java/eu/brassepc/fitnessdroid/data/Bmr.kt
@@ -0,0 +1,20 @@
+package eu.brassepc.fitnessdroid.data
+
+import java.time.LocalDate
+
+/**
+ * Basalmetabolism (kcal/dygn) enligt Mifflin–St Jeor:
+ * 10·vikt + 6.25·längd − 5·ålder + 5 (man) / −161 (kvinna).
+ * null om något av underlagen saknas.
+ */
+fun bmrKcalPerDay(
+    weightKg: Double?,
+    heightCm: Double?,
+    birthYear: Int?,
+    isFemale: Boolean?,
+): Double? {
+    if (weightKg == null || heightCm == null || birthYear == null || isFemale == null) return null
+    val age = (LocalDate.now().year - birthYear).coerceIn(0, 120)
+    val k = if (isFemale) -161.0 else 5.0
+    return 10.0 * weightKg + 6.25 * heightCm - 5.0 * age + k
+}
diff --git a/app/src/main/java/eu/brassepc/fitnessdroid/data/GymApi.kt b/app/src/main/java/eu/brassepc/fitnessdroid/data/GymApi.kt
index 31316b0..da0abad 100644
--- a/app/src/main/java/eu/brassepc/fitnessdroid/data/GymApi.kt
+++ b/app/src/main/java/eu/brassepc/fitnessdroid/data/GymApi.kt
@@ -1,8 +1,10 @@
 package eu.brassepc.fitnessdroid.data
 
 import kotlinx.serialization.Serializable
+import kotlinx.serialization.json.buildJsonObject
 import kotlinx.serialization.json.decodeFromJsonElement
 import kotlinx.serialization.json.jsonObject
+import kotlinx.serialization.json.put
 
 @Serializable
 data class Profile(
@@ -10,6 +12,10 @@ data class Profile(
     val displayName: String? = null,
     val email: String? = null,
     val bodyWeightKg: Double? = null,
+    val heightCm: Double? = null,
+    val birthYear: Int? = null,
+    /** "male"/"female" — serverns konvention */
+    val sex: String? = null,
 )
 
 /** Autentiserade anrop mot gym-API:t. Query-strängarna speglar gymTrackerApi.js. */
@@ -18,14 +24,37 @@ class GymApi(
     private val auth: AuthRepository,
 ) {
     suspend fun myProfile(): Profile {
-        val data = client.execute(MY_PROFILE, token = auth.bearerToken())
+        // Fallback till gamla fältuppsättningen mot en äldre server.
+        val data = try {
+            client.execute(MY_PROFILE, token = auth.bearerToken())
+        } catch (e: GraphQlException) {
+            client.execute(MY_PROFILE_LEGACY, token = auth.bearerToken())
+        }
         val profile = data["myProfile"]?.jsonObject
             ?: throw GraphQlException(listOf("Kunde inte hämta profilen"))
         return client.json.decodeFromJsonElement(profile)
     }
 
+    /** Kroppsdata till servern. null = rör ej, -1/"" = rensa (serverns konvention). */
+    suspend fun updateProfile(heightCm: Double?, birthYear: Int?, sex: String?): Profile {
+        val data = client.execute(
+            "mutation(\$h: Float,\$y: Int,\$s: String){updateProfile(heightCm:\$h,birthYear:\$y,sex:\$s){username displayName email bodyWeightKg heightCm birthYear sex}}",
+            buildJsonObject {
+                heightCm?.let { put("h", it) }
+                birthYear?.let { put("y", it) }
+                sex?.let { put("s", it) }
+            },
+            auth.bearerToken(),
+        )
+        val profile = data["updateProfile"]?.jsonObject
+            ?: throw GraphQlException(listOf("Kunde inte spara kroppsdata"))
+        return client.json.decodeFromJsonElement(profile)
+    }
+
     companion object {
         private const val MY_PROFILE =
+            "query{myProfile{username displayName email bodyWeightKg heightCm birthYear sex}}"
+        private const val MY_PROFILE_LEGACY =
             "query{myProfile{username displayName email bodyWeightKg}}"
     }
 }
diff --git a/app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeScreen.kt b/app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeScreen.kt
index 1674013..fc2967a 100644
--- a/app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeScreen.kt
+++ b/app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeScreen.kt
@@ -13,9 +13,13 @@ import androidx.compose.foundation.lazy.items
 import androidx.compose.foundation.rememberScrollState
 import androidx.compose.foundation.verticalScroll
 import androidx.compose.material.icons.Icons
+import androidx.compose.material.icons.filled.Bedtime
 import androidx.compose.material.icons.filled.CloudDone
 import androidx.compose.material.icons.filled.CloudOff
 import androidx.compose.material.icons.filled.CloudUpload
+import androidx.compose.material.icons.filled.FitnessCenter
+import androidx.compose.material.icons.filled.LocalFireDepartment
+import androidx.compose.material.icons.filled.PhoneAndroid
 import androidx.compose.material.icons.filled.PlayArrow
 import androidx.compose.material.icons.filled.Star
 import androidx.compose.material.icons.filled.SystemUpdate
@@ -43,6 +47,7 @@ fun HomeScreen(
     val uiState by viewModel.uiState.collectAsStateWithLifecycle()
     val updateState by viewModel.updateState.collectAsStateWithLifecycle()
     val displayName by viewModel.displayName.collectAsStateWithLifecycle()
+    val kcalToday by viewModel.kcalToday.collectAsStateWithLifecycle()
 
     Column(
         modifier = Modifier
@@ -66,6 +71,8 @@ fun HomeScreen(
             SyncChip(status = uiState.syncStatus, pending = uiState.pendingCount)
         }
 
+        KcalTodayCard(kcalToday)
+
         updateState?.let { update ->
             Card(modifier = Modifier.fillMaxWidth()) {
                 Row(
@@ -197,6 +204,92 @@ fun HomeScreen(
     }
 }
 
+/** Dagens kaloriförbränning — aktivt loggat / telefon / passivt (BMR). */
+@Composable
+private fun KcalTodayCard(kcal: KcalToday) {
+    Card(modifier = Modifier.fillMaxWidth()) {
+        Column(
+            modifier = Modifier.padding(16.dp),
+            verticalArrangement = Arrangement.spacedBy(8.dp),
+        ) {
+            Row(verticalAlignment = Alignment.CenterVertically) {
+                Icon(
+                    Icons.Default.LocalFireDepartment,
+                    contentDescription = null,
+                    tint = MaterialTheme.colorScheme.primary,
+                )
+                Text(
+                    "Dagens kalorier",
+                    style = MaterialTheme.typography.titleSmall,
+                    modifier = Modifier.weight(1f).padding(start = 8.dp),
+                )
+                Text(
+                    "${kcal.totalKcal.toInt()} kcal",
+                    style = MaterialTheme.typography.headlineSmall,
+                    color = MaterialTheme.colorScheme.primary,
+                )
+            }
+
+            KcalRow(
+                icon = Icons.Default.FitnessCenter,
+                label = "Aktivt loggat",
+                value = "${kcal.activeKcal.toInt()} kcal",
+            )
+            KcalRow(
+                icon = Icons.Default.PhoneAndroid,
+                label = "Telefonen (steg m.m.)",
+                value = "kommer snart",
+                dimValue = true,
+            )
+            KcalRow(
+                icon = Icons.Default.Bedtime,
+                label = "Passivt (BMR)",
+                value = kcal.passiveKcalSoFar?.let {
+                    "${it.toInt()} kcal · ${kcal.bmrPerDay?.toInt()} vid midnatt"
+                } ?: "—",
+            )
+
+            if (!kcal.hasBodyData) {
+                Text(
+                    "Fyll i vikt + kroppsdata (längd/födelseår/kön) i profilen " +
+                        "så kan den passiva förbränningen räknas ut.",
+                    style = MaterialTheme.typography.bodySmall,
+                    color = MaterialTheme.colorScheme.onSurfaceVariant,
+                )
+            }
+        }
+    }
+}
+
+@Composable
+private fun KcalRow(
+    icon: androidx.compose.ui.graphics.vector.ImageVector,
+    label: String,
+    value: String,
+    dimValue: Boolean = false,
+) {
+    Row(verticalAlignment = Alignment.CenterVertically) {
+        Icon(
+            icon,
+            contentDescription = null,
+            tint = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.padding(end = 8.dp),
+        )
+        Text(
+            label,
+            style = MaterialTheme.typography.bodySmall,
+            color = MaterialTheme.colorScheme.onSurfaceVariant,
+            modifier = Modifier.weight(1f),
+        )
+        Text(
+            value,
+            style = MaterialTheme.typography.bodySmall,
+            color = if (dimValue) MaterialTheme.colorScheme.onSurfaceVariant
+            else MaterialTheme.colorScheme.onSurface,
+        )
+    }
+}
+
 @Composable
 private fun SyncChip(status: SyncStatus, pending: Int) {
     val (icon, text) = when {
diff --git a/app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeViewModel.kt b/app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeViewModel.kt
index aa38662..13d9b12 100644
--- a/app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeViewModel.kt
+++ b/app/src/main/java/eu/brassepc/fitnessdroid/ui/home/HomeViewModel.kt
@@ -30,10 +30,30 @@ sealed interface UpdateState {
     data class Failed(val message: String) : UpdateState
 }
 
+/**
+ * Dagens kaloriförbränning, tredelad. Telefondelen (steg/auto-aktiviteter via
+ * Health Connect) kommer i en senare etapp och är null tills dess.
+ */
+data class KcalToday(
+    /** Aktivt loggat: gympass (och framöver aktiviteter) */
+    val activeKcal: Double = 0.0,
+    /** Passivt: BMR-andel av dygnet som gått */
+    val passiveKcalSoFar: Double? = null,
+    /** BMR för hela dygnet (för "i mål vid midnatt"-visning) */
+    val bmrPerDay: Double? = null,
+    /** Telefonens auto-loggade (steg) — etapp 5 */
+    val phoneKcal: Double? = null,
+    /** false = längd/födelseår/kön saknas, mätaren kan inte räkna passivt */
+    val hasBodyData: Boolean = false,
+) {
+    val totalKcal: Double get() = activeKcal + (passiveKcalSoFar ?: 0.0) + (phoneKcal ?: 0.0)
+}
+
 class HomeViewModel(
     private val repo: GymRepository,
     auth: AuthRepository,
     private val updateChecker: eu.brassepc.fitnessdroid.data.UpdateChecker,
+    private val gymApi: eu.brassepc.fitnessdroid.data.GymApi,
 ) : ViewModel() {
 
     val updateState = kotlinx.coroutines.flow.MutableStateFlow<UpdateState?>(null)
@@ -41,11 +61,61 @@ class HomeViewModel(
     /** Helnamn från profilen — trevligare hälsning än användarnamnet. */
     val displayName = kotlinx.coroutines.flow.MutableStateFlow<String?>(null)
 
+    val kcalToday = kotlinx.coroutines.flow.MutableStateFlow(KcalToday())
+
     init {
         viewModelScope.launch {
             displayName.value = repo.displayName()
             updateChecker.check()?.let { updateState.value = UpdateState.Available(it) }
         }
+        viewModelScope.launch {
+            refreshKcal()
+            // Passivdelen tickar med tiden — räkna om lokalt varje minut
+            // (nätverket rörs bara vid laddning).
+            while (true) {
+                kotlinx.coroutines.delay(60_000)
+                tickPassive()
+            }
+        }
+    }
+
+    private fun secondsIntoToday(): Long = java.time.Duration.between(
+        java.time.LocalDate.now().atStartOfDay(), java.time.LocalDateTime.now()
+    ).seconds.coerceAtLeast(0)
+
+    private fun tickPassive() {
+        val current = kcalToday.value
+        kcalToday.value = current.copy(
+            passiveKcalSoFar = current.bmrPerDay?.let { it * secondsIntoToday() / 86_400.0 },
+        )
+    }
+
+    private suspend fun refreshKcal() {
+        val today = java.time.LocalDate.now()
+        val active = runCatching {
+            repo.fetchHistory(limit = 15)
+                .filter { it.date.take(10) == today.toString() }
+                .sumOf { it.calories ?: 0.0 }
+        }.getOrElse { kcalToday.value.activeKcal }
+
+        val (bmr, hasBodyData) = runCatching {
+            val p = gymApi.myProfile()
+            val bmr = eu.brassepc.fitnessdroid.data.bmrKcalPerDay(
+                weightKg = p.bodyWeightKg,
+                heightCm = p.heightCm,
+                birthYear = p.birthYear,
+                isFemale = p.sex?.let { it == "female" },
+            )
+            bmr to (bmr != null)
+        }.getOrElse { kcalToday.value.bmrPerDay to kcalToday.value.hasBodyData }
+
+        kcalToday.value = KcalToday(
+            activeKcal = active,
+            passiveKcalSoFar = bmr?.let { it * secondsIntoToday() / 86_400.0 },
+            bmrPerDay = bmr,
+            phoneKcal = null,
+            hasBodyData = hasBodyData,
+        )
     }
 
     fun startUpdate() {
@@ -99,7 +169,7 @@ class HomeViewModel(
         val Factory: ViewModelProvider.Factory = viewModelFactory {
             initializer {
                 val c = appContainer()
-                HomeViewModel(c.gymRepository, c.authRepository, c.updateChecker)
+                HomeViewModel(c.gymRepository, c.authRepository, c.updateChecker, c.gymApi)
             }
         }
     }
diff --git a/app/src/main/java/eu/brassepc/fitnessdroid/ui/profile/ProfileScreen.kt b/app/src/main/java/eu/brassepc/fitnessdroid/ui/profile/ProfileScreen.kt
index b5f05dc..21d2a31 100644
--- a/app/src/main/java/eu/brassepc/fitnessdroid/ui/profile/ProfileScreen.kt
+++ b/app/src/main/java/eu/brassepc/fitnessdroid/ui/profile/ProfileScreen.kt
@@ -47,6 +47,7 @@ import eu.brassepc.fitnessdroid.data.Profile
 import eu.brassepc.fitnessdroid.ui.appContainer
 import eu.brassepc.fitnessdroid.ui.common.compact
 import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.first
 import kotlinx.coroutines.launch
 
 class ProfileViewModel(
@@ -60,15 +61,57 @@ class ProfileViewModel(
     val message = MutableStateFlow<String?>(null)
     val settings = settingsStore.settings
 
+    /** Kroppsdata sparas lokalt (för vågen/offline) och synkas till servern. */
     fun saveBodyData(heightCm: Double?, birthYear: Int?, isFemale: Boolean?) {
-        viewModelScope.launch { settingsStore.setBodyData(heightCm, birthYear, isFemale) }
+        viewModelScope.launch {
+            settingsStore.setBodyData(heightCm, birthYear, isFemale)
+            try {
+                // Tomt fält = rensa på servern (-1/"" är serverns konvention)
+                gymApi.updateProfile(
+                    heightCm = heightCm ?: -1.0,
+                    birthYear = birthYear ?: -1,
+                    sex = when (isFemale) {
+                        true -> "female"
+                        false -> "male"
+                        null -> ""
+                    },
+                )
+            } catch (e: Exception) {
+                message.value = "Kroppsdata sparad lokalt — kunde inte nå servern"
+            }
+        }
+    }
+
+    /**
+     * Håll lokala kroppsdatan i synk med servern: serverns värden vinner,
+     * men finns de bara lokalt (satta innan servern fick fälten) pushas de upp.
+     */
+    private suspend fun syncBodyData(p: Profile) {
+        val local = settingsStore.settings.first()
+        val serverHas = p.heightCm != null || p.birthYear != null || p.sex != null
+        val localHas = local.heightCm != null || local.birthYear != null || local.isFemale != null
+        if (serverHas) {
+            settingsStore.setBodyData(p.heightCm, p.birthYear, p.sex?.let { it == "female" })
+        } else if (localHas) {
+            runCatching {
+                gymApi.updateProfile(
+                    heightCm = local.heightCm,
+                    birthYear = local.birthYear,
+                    sex = local.isFemale?.let { if (it) "female" else "male" },
+                )
+            }
+        }
     }
 
     init { load() }
 
     fun load() {
         viewModelScope.launch {
-            runCatching { profile.value = gymApi.myProfile() }
+            runCatching {
+                val p = gymApi.myProfile()
+                profile.value = p
+                syncBodyData(p)
+            }
             runCatching { measurements.value = repo.fetchBodyMeasurements().reversed() }
         }
     }
diff --git a/doc/activities-plan.md b/doc/activities-plan.md
index 48659aa..928c2be 100644
--- a/doc/activities-plan.md
+++ b/doc/activities-plan.md
@@ -99,7 +99,7 @@ frontend av `src/**` m.fl., FitnessDroid av varje push till main.)
 
 ## Status
 
-- [ ] Etapp 1 — Profil & kalorigrund
+- [x] Etapp 1 — Profil & kalorigrund *(kod klar 2026-08-23: backend a1cd4d3, webb 560894c, app — väntar på användartest + omdeploy av gym-api/frontend-containrarna)*
 - [ ] Etapp 2 — Aktiviteter: bibliotek + manuell logg
 - [ ] Etapp 3 — Live-spårning (GPS)
 - [ ] Etapp 4 — Mål & mätare