diff --git a/composeApp/src/androidMain/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistration.android.kt b/composeApp/src/androidMain/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistration.android.kt
new file mode 100644
index 00000000..3779c281
--- /dev/null
+++ b/composeApp/src/androidMain/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistration.android.kt
@@ -0,0 +1,19 @@
+package com.nuvio.app.core.auth
+
+import android.os.Build
+
+internal actual fun currentDeviceClientMetadata(): DeviceClientMetadata {
+    val deviceName = formatDeviceName(
+        manufacturer = Build.MANUFACTURER.orEmpty(),
+        model = Build.MODEL.orEmpty(),
+        fallback = "Android device",
+    )
+    val osVersion = Build.VERSION.RELEASE.orEmpty()
+        .trim()
+        .ifBlank { Build.VERSION.SDK_INT.toString() }
+
+    return DeviceClientMetadata(
+        deviceName = deviceName,
+        platform = "Android $osVersion",
+    )
+}
diff --git a/composeApp/src/commonMain/kotlin/com/nuvio/app/App.kt b/composeApp/src/commonMain/kotlin/com/nuvio/app/App.kt
index dd8cc3e7..d0d41f53 100644
--- a/composeApp/src/commonMain/kotlin/com/nuvio/app/App.kt
+++ b/composeApp/src/commonMain/kotlin/com/nuvio/app/App.kt
@@ -86,6 +86,7 @@ import coil3.svg.SvgDecoder
 import com.nuvio.app.core.build.AppFeaturePolicy
 import com.nuvio.app.core.auth.AuthRepository
 import com.nuvio.app.core.auth.AuthState
+import com.nuvio.app.core.auth.DeviceSessionRegistration
 import com.nuvio.app.core.deeplink.AppDeepLink
 import com.nuvio.app.core.deeplink.AppDeepLinkRepository
 import com.nuvio.app.core.network.NetworkCondition
@@ -488,6 +489,11 @@ fun App(
             NetworkStatusRepository.uiState
         }.collectAsStateWithLifecycle()
 
+        LaunchedEffect(authState) {
+            if (!ownsAppRuntime) return@LaunchedEffect
+            DeviceSessionRegistration.registerIfAuthenticated(force = true)
+        }
+
         LaunchedEffect(
             profileState.activeProfile?.profileIndex,
             profileState.activeProfile?.name,
@@ -1051,6 +1057,7 @@ private fun MainAppContent(
         if (!ownsAppRuntime) return@LaunchedEffect
         AppForegroundMonitor.events().collect {
             NetworkStatusRepository.requestForegroundRefresh()
+            DeviceSessionRegistration.registerIfAuthenticated()
         }
     }
 
diff --git a/composeApp/src/commonMain/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistration.kt b/composeApp/src/commonMain/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistration.kt
new file mode 100644
index 00000000..df785b81
--- /dev/null
+++ b/composeApp/src/commonMain/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistration.kt
@@ -0,0 +1,90 @@
+package com.nuvio.app.core.auth
+
+import co.touchlab.kermit.Logger
+import com.nuvio.app.core.build.AppVersionConfig
+import com.nuvio.app.core.network.SupabaseProvider
+import com.nuvio.app.core.sync.SyncClientIdentity
+import io.github.jan.supabase.postgrest.postgrest
+import io.github.jan.supabase.postgrest.rpc
+import kotlinx.coroutines.CancellationException
+import kotlinx.coroutines.sync.Mutex
+import kotlinx.coroutines.sync.withLock
+import kotlinx.serialization.json.JsonObject
+import kotlinx.serialization.json.buildJsonObject
+import kotlinx.serialization.json.put
+import kotlin.time.Duration.Companion.minutes
+import kotlin.time.TimeMark
+import kotlin.time.TimeSource
+
+private const val CLIENT_NAME = "Nuvio Mobile"
+private val REGISTRATION_INTERVAL = 15.minutes
+
+internal data class DeviceClientMetadata(
+    val deviceName: String,
+    val platform: String,
+)
+
+internal expect fun currentDeviceClientMetadata(): DeviceClientMetadata
+
+object DeviceSessionRegistration {
+    private val log = Logger.withTag("DeviceSessionRegistration")
+    private val registrationMutex = Mutex()
+    private var lastRegistration: TimeMark? = null
+
+    suspend fun registerIfAuthenticated(force: Boolean = false): Boolean {
+        val authState = AuthRepository.state.value as? AuthState.Authenticated ?: return false
+        if (authState.isAnonymous) return false
+
+        return registrationMutex.withLock {
+            if (!force && lastRegistration?.elapsedNow()?.let { it < REGISTRATION_INTERVAL } == true) {
+                return@withLock true
+            }
+
+            val metadata = currentDeviceClientMetadata()
+            val params = buildDeviceRegistrationParams(
+                installationId = SyncClientIdentity.currentClientId(),
+                clientVersion = AppVersionConfig.VERSION_NAME,
+                metadata = metadata,
+            )
+
+            try {
+                SupabaseProvider.client.postgrest.rpc("register_current_device", params)
+                lastRegistration = TimeSource.Monotonic.markNow()
+                true
+            } catch (error: CancellationException) {
+                throw error
+            } catch (error: Throwable) {
+                log.w(error) { "Device session registration failed" }
+                false
+            }
+        }
+    }
+}
+
+internal fun buildDeviceRegistrationParams(
+    installationId: String,
+    clientVersion: String,
+    metadata: DeviceClientMetadata,
+): JsonObject = buildJsonObject {
+    put("p_installation_id", installationId)
+    put("p_client_name", CLIENT_NAME)
+    put("p_client_version", clientVersion)
+    put("p_platform", metadata.platform)
+    put("p_device_name", metadata.deviceName)
+}
+
+internal fun formatDeviceName(
+    manufacturer: String,
+    model: String,
+    fallback: String,
+): String {
+    val normalizedManufacturer = manufacturer.trim()
+    val normalizedModel = model.trim()
+
+    return when {
+        normalizedModel.isBlank() -> fallback
+        normalizedManufacturer.isBlank() -> normalizedModel
+        normalizedModel.startsWith(normalizedManufacturer, ignoreCase = true) -> normalizedModel
+        else -> "$normalizedManufacturer $normalizedModel"
+    }
+}
diff --git a/composeApp/src/commonTest/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistrationTest.kt b/composeApp/src/commonTest/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistrationTest.kt
new file mode 100644
index 00000000..065f43d4
--- /dev/null
+++ b/composeApp/src/commonTest/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistrationTest.kt
@@ -0,0 +1,36 @@
+package com.nuvio.app.core.auth
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class DeviceSessionRegistrationTest {
+    @Test
+    fun buildsOfficialClientRegistrationPayload() {
+        val params = buildDeviceRegistrationParams(
+            installationId = "nuvio-mobile-installation",
+            clientVersion = "1.2.3",
+            metadata = DeviceClientMetadata(
+                deviceName = "Google Pixel 9",
+                platform = "Android 16",
+            ),
+        )
+
+        assertEquals("nuvio-mobile-installation", params.getValue("p_installation_id").toString().trim('"'))
+        assertEquals("Nuvio Mobile", params.getValue("p_client_name").toString().trim('"'))
+        assertEquals("1.2.3", params.getValue("p_client_version").toString().trim('"'))
+        assertEquals("Android 16", params.getValue("p_platform").toString().trim('"'))
+        assertEquals("Google Pixel 9", params.getValue("p_device_name").toString().trim('"'))
+    }
+
+    @Test
+    fun combinesManufacturerAndModelWithoutRepeatingManufacturer() {
+        assertEquals(
+            "Samsung SM-S918B",
+            formatDeviceName("Samsung", "SM-S918B", "Android device"),
+        )
+        assertEquals(
+            "Google Pixel 9",
+            formatDeviceName("Google", "Google Pixel 9", "Android device"),
+        )
+    }
+}
diff --git a/composeApp/src/iosMain/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistration.ios.kt b/composeApp/src/iosMain/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistration.ios.kt
new file mode 100644
index 00000000..0259ebf2
--- /dev/null
+++ b/composeApp/src/iosMain/kotlin/com/nuvio/app/core/auth/DeviceSessionRegistration.ios.kt
@@ -0,0 +1,17 @@
+package com.nuvio.app.core.auth
+
+import platform.UIKit.UIDevice
+
+internal actual fun currentDeviceClientMetadata(): DeviceClientMetadata {
+    val device = UIDevice.currentDevice
+    val deviceName = device.name
+        .trim()
+        .ifBlank { device.localizedModel.trim() }
+        .ifBlank { "Apple device" }
+    val platform = "${device.systemName()} ${device.systemVersion}".trim()
+
+    return DeviceClientMetadata(
+        deviceName = deviceName,
+        platform = platform,
+    )
+}