diff --git a/android/build.gradle b/android/build.gradle
index 05e0d2d1..ca5b85c0 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -3,6 +3,24 @@ plugins {
     id "org.jetbrains.kotlin.android"
 }
 
+def omSdkLocalMavenRepo = uri("${project.projectDir}/local-maven")
+
+rootProject.allprojects {
+    repositories {
+        maven {
+            url omSdkLocalMavenRepo
+        }
+    }
+}
+
+repositories {
+    google()
+    mavenCentral()
+    maven {
+        url omSdkLocalMavenRepo
+    }
+}
+
 android {
     namespace "so.kontext.sdk.flutter"
     compileSdk = 34
@@ -27,4 +45,5 @@ android {
 dependencies {
     implementation "androidx.webkit:webkit:1.8.0"
     implementation "com.google.android.gms:play-services-ads-identifier:18.0.1"
+    implementation "iab:omsdk-android:1.6.4"
 }
diff --git a/android/local-maven/iab/omsdk-android/1.6.4/omsdk-android-1.6.4.aar b/android/local-maven/iab/omsdk-android/1.6.4/omsdk-android-1.6.4.aar
new file mode 100644
index 00000000..4f69f041
Binary files /dev/null and b/android/local-maven/iab/omsdk-android/1.6.4/omsdk-android-1.6.4.aar differ
diff --git a/android/local-maven/iab/omsdk-android/1.6.4/omsdk-android-1.6.4.pom b/android/local-maven/iab/omsdk-android/1.6.4/omsdk-android-1.6.4.pom
new file mode 100644
index 00000000..e2676bcd
--- /dev/null
+++ b/android/local-maven/iab/omsdk-android/1.6.4/omsdk-android-1.6.4.pom
@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project>
+  <modelVersion>4.0.0</modelVersion>
+  <groupId>iab</groupId>
+  <artifactId>omsdk-android</artifactId>
+  <version>1.6.4</version>
+  <packaging>aar</packaging>
+</project>
diff --git a/android/src/main/kotlin/so/kontext/sdk/flutter/KontextInAppWebView.kt b/android/src/main/kotlin/so/kontext/sdk/flutter/KontextInAppWebView.kt
index 15ea39f4..8fe229d3 100644
--- a/android/src/main/kotlin/so/kontext/sdk/flutter/KontextInAppWebView.kt
+++ b/android/src/main/kotlin/so/kontext/sdk/flutter/KontextInAppWebView.kt
@@ -6,6 +6,7 @@ import android.graphics.Color
 import android.os.Build
 import android.os.Handler
 import android.os.Looper
+import android.util.Log
 import android.view.View
 import android.view.ViewGroup
 import android.webkit.CookieManager
@@ -24,6 +25,10 @@ import io.flutter.plugin.common.BinaryMessenger
 import io.flutter.plugin.common.MethodCall
 import io.flutter.plugin.common.MethodChannel
 import io.flutter.plugin.platform.PlatformView
+import so.kontext.sdk.flutter.omsdk.OMConstants
+import so.kontext.sdk.flutter.omsdk.OMCreativeType
+import so.kontext.sdk.flutter.omsdk.WebViewOMLifecycle
+
 private const val CHANNEL_PREFIX = "kontext_flutter_sdk/in_app_webview/"
 private const val JAVASCRIPT_BRIDGE_NAME = "flutter_inappwebview"
 private const val MAX_BYPASS_MAIN_FRAME_LOADS = 100
@@ -53,10 +58,22 @@ internal class KontextInAppWebView(
     private val initialUrl = readInitialUrl(creationParams)
     private val settings = readSettings(creationParams)
     private val initialUserScripts = readUserScripts(creationParams)
-    private var hasLoadedInitialUrl = false
-
-    private val bypassMainFrameLoads = linkedSetOf<String>()
     private val documentStartSupported = WebViewFeature.isFeatureSupported(WebViewFeature.DOCUMENT_START_SCRIPT)
+    private val openMeasurementJavascript = if (documentStartSupported) {
+        loadOpenMeasurementJavaScript(context)
+    } else {
+        null
+    }
+    private val omLifecycle = WebViewOMLifecycle(
+        webView = webView,
+        initialContentUrl = initialUrl,
+        initialCreativeType = readInitialOmCreativeType(creationParams),
+        canUseOpenMeasurement = ::canUseOpenMeasurement,
+        logUnsupportedOpenMeasurement = ::logUnsupportedOpenMeasurement,
+    )
+    private val bypassMainFrameLoads = linkedSetOf<String>()
+
+    private var hasLoadedInitialUrl = false
 
     private val bridgeScript = """
         (function() {
@@ -129,10 +146,12 @@ internal class KontextInAppWebView(
     override fun getView(): View = webView
 
     override fun dispose() {
+        omLifecycle.finish()
         channel.setMethodCallHandler(null)
-        webView.stopLoading()
         webView.removeJavascriptInterface(JAVASCRIPT_BRIDGE_NAME)
-        webView.destroy()
+        if (!omLifecycle.dispose()) {
+            destroyWebViewImmediately()
+        }
     }
 
     override fun onMethodCall(call: MethodCall, result: MethodChannel.Result) {
@@ -155,6 +174,33 @@ internal class KontextInAppWebView(
                     result.success(null)
                 }
             }
+            "configureOpenMeasurement" -> {
+                mainHandler.post {
+                    omLifecycle.configure(call.argument("creativeType"))
+                    result.success(null)
+                }
+            }
+            "startOpenMeasurementSession" -> {
+                mainHandler.post {
+                    omLifecycle.requestStart()
+                    result.success(null)
+                }
+            }
+            "logOpenMeasurementError" -> {
+                mainHandler.post {
+                    omLifecycle.logError(
+                        errorType = call.argument("errorType"),
+                        message = call.argument("message"),
+                    )
+                    result.success(null)
+                }
+            }
+            "finishOpenMeasurementSession" -> {
+                mainHandler.post {
+                    omLifecycle.finish()
+                    result.success(null)
+                }
+            }
             else -> result.notImplemented()
         }
     }
@@ -192,6 +238,7 @@ internal class KontextInAppWebView(
         }
 
         if (documentStartSupported) {
+            openMeasurementJavascript?.let(::addDocumentStartScript)
             addDocumentStartScript(bridgeScript)
             // To avoid Android WebView loader for videos, inject JS code with 1x1 transparent pixel.
             addDocumentStartScript(posterStartScript)
@@ -260,6 +307,7 @@ internal class KontextInAppWebView(
 
             override fun onPageStarted(view: WebView, url: String?, favicon: android.graphics.Bitmap?) {
                 super.onPageStarted(view, url, favicon)
+                omLifecycle.markPageStarted(url)
                 if (!documentStartSupported) {
                     // Older WebView versions do not support document-start scripts, so this
                     // fallback injects asynchronously and may still lose the race to early
@@ -277,6 +325,7 @@ internal class KontextInAppWebView(
                     .filter { it.injectionTime == "AT_DOCUMENT_END" }
                     .forEach { evaluateJavascript(it.source) }
                 evaluateJavascript(PLATFORM_READY_SCRIPT)
+                omLifecycle.markPageFinished(url)
             }
 
             override fun onReceivedError(
@@ -342,6 +391,7 @@ internal class KontextInAppWebView(
             return
         }
         hasLoadedInitialUrl = true
+        omLifecycle.markPageStarted(initialUrl)
         if (!initialUrl.isNullOrBlank()) {
             webView.loadUrl(initialUrl)
         }
@@ -395,6 +445,30 @@ internal class KontextInAppWebView(
         """.trimIndent()
     }
 
+    private fun canUseOpenMeasurement(): Boolean = documentStartSupported && openMeasurementJavascript != null
+
+    private fun logUnsupportedOpenMeasurement() {
+        Log.w(
+            OMConstants.logTag,
+            if (!documentStartSupported) {
+                "DOCUMENT_START_SCRIPT not supported, OM SDK disabled for this WebView"
+            } else {
+                "OM SDK JavaScript resource could not be loaded, OM SDK disabled for this WebView"
+            }
+        )
+    }
+
+    private fun destroyWebViewImmediately() {
+        try {
+            (webView.parent as? ViewGroup)?.removeView(webView)
+            webView.stopLoading()
+            webView.loadUrl("about:blank")
+            webView.destroy()
+        } catch (exception: Throwable) {
+            Log.w(OMConstants.logTag, "Immediate WebView destroy failed", exception)
+        }
+    }
+
     private fun evaluateJavascript(source: String) {
         webView.evaluateJavascript(source, null)
     }
@@ -464,6 +538,10 @@ private data class AndroidUserScript(
     val injectionTime: String,
 )
 
+private fun readInitialOmCreativeType(creationParams: Map<String, Any?>?): OMCreativeType? {
+    return OMCreativeType.fromRawValue(creationParams?.get("initialOmCreativeType") as? String)
+}
+
 private fun readInitialUrl(creationParams: Map<String, Any?>?): String? {
     val initialRequest = creationParams?.get("initialUrlRequest") as? Map<*, *>
     return initialRequest?.get("url") as? String
@@ -494,6 +572,17 @@ private fun readUserScripts(creationParams: Map<String, Any?>?): List<AndroidUse
     }
 }
 
+private fun loadOpenMeasurementJavaScript(context: Context): String? {
+    return try {
+        context.resources.openRawResource(R.raw.omsdk_v1)
+            .bufferedReader(Charsets.UTF_8)
+            .use { it.readText() }
+    } catch (exception: Exception) {
+        Log.e(OMConstants.logTag, "Failed to load OM SDK JavaScript", exception)
+        null
+    }
+}
+
 private fun consoleLevelName(level: android.webkit.ConsoleMessage.MessageLevel): String {
     return when (level) {
         android.webkit.ConsoleMessage.MessageLevel.ERROR -> "ERROR"
diff --git a/android/src/main/kotlin/so/kontext/sdk/flutter/KontextSdkPlugin.kt b/android/src/main/kotlin/so/kontext/sdk/flutter/KontextSdkPlugin.kt
index e83ad008..b32bd180 100644
--- a/android/src/main/kotlin/so/kontext/sdk/flutter/KontextSdkPlugin.kt
+++ b/android/src/main/kotlin/so/kontext/sdk/flutter/KontextSdkPlugin.kt
@@ -1,6 +1,7 @@
 package so.kontext.sdk.flutter
 
 import io.flutter.embedding.engine.plugins.FlutterPlugin
+import so.kontext.sdk.flutter.omsdk.OMSDKPlugin
 
 class KontextSdkPlugin : FlutterPlugin {
     private val advertisingId = AdvertisingIdPlugin()
@@ -10,6 +11,7 @@ class KontextSdkPlugin : FlutterPlugin {
     private val inAppWebView = KontextInAppWebViewPlugin()
     private val network = DeviceNetworkPlugin()
     private val os = OperationSystemPlugin()
+    private val omsdk = OMSDKPlugin()
     private val power = DevicePowerPlugin()
     private val tcf = TransparencyConsentFramework()
 
@@ -21,6 +23,7 @@ class KontextSdkPlugin : FlutterPlugin {
         inAppWebView.onAttachedToEngine(binding)
         network.onAttachedToEngine(binding)
         os.onAttachedToEngine(binding)
+        omsdk.onAttachedToEngine(binding)
         power.onAttachedToEngine(binding)
         tcf.onAttachedToEngine(binding)
     }
@@ -32,6 +35,7 @@ class KontextSdkPlugin : FlutterPlugin {
         hardware.onDetachedFromEngine(binding)
         network.onDetachedFromEngine(binding)
         os.onDetachedFromEngine(binding)
+        omsdk.onDetachedFromEngine(binding)
         power.onDetachedFromEngine(binding)
         tcf.onDetachedFromEngine(binding)
     }
diff --git a/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMConstants.kt b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMConstants.kt
new file mode 100644
index 00000000..ebc535d7
--- /dev/null
+++ b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMConstants.kt
@@ -0,0 +1,9 @@
+package so.kontext.sdk.flutter.omsdk
+
+internal object OMConstants {
+    const val channelName = "kontext_flutter_sdk/omsdk"
+    const val integrationVersion = "1.0.0"
+    const val logTag = "Kontext SDK"
+    const val partnerName = "Kontextso"
+    const val retentionIntervalMillis = 1000L
+}
diff --git a/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMManager.kt b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMManager.kt
new file mode 100644
index 00000000..e1644e51
--- /dev/null
+++ b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMManager.kt
@@ -0,0 +1,96 @@
+package so.kontext.sdk.flutter.omsdk
+
+import android.content.Context
+import android.util.Log
+import android.webkit.WebView
+import com.iab.omid.library.kontextso.Omid
+import com.iab.omid.library.kontextso.adsession.AdSession
+import com.iab.omid.library.kontextso.adsession.AdSessionConfiguration
+import com.iab.omid.library.kontextso.adsession.AdSessionContext
+import com.iab.omid.library.kontextso.adsession.CreativeType
+import com.iab.omid.library.kontextso.adsession.ImpressionType
+import com.iab.omid.library.kontextso.adsession.Owner
+import com.iab.omid.library.kontextso.adsession.Partner
+
+internal enum class OMCreativeType(val rawValue: String) {
+    DISPLAY("display"),
+    VIDEO("video");
+
+    companion object {
+        fun fromRawValue(value: String?): OMCreativeType? = values().firstOrNull { it.rawValue == value }
+    }
+}
+
+internal object OMManager {
+    private val partner: Partner? by lazy {
+        try {
+            Partner.createPartner(OMConstants.partnerName, OMConstants.integrationVersion)
+        } catch (exception: IllegalArgumentException) {
+            Log.e(OMConstants.logTag, "OM partner creation failed", exception)
+            null
+        }
+    }
+
+    fun activate(context: Context): Boolean {
+        if (Omid.isActive()) {
+            return true
+        }
+
+        return try {
+            Omid.activate(context.applicationContext)
+            Omid.isActive()
+        } catch (exception: IllegalArgumentException) {
+            Log.e(OMConstants.logTag, "OM SDK activation failed", exception)
+            false
+        } catch (exception: IllegalStateException) {
+            Log.e(OMConstants.logTag, "OM SDK activation failed", exception)
+            false
+        }
+    }
+
+    fun createSession(
+        webView: WebView,
+        contentUrl: String?,
+        creativeType: OMCreativeType,
+    ): OMSession? {
+        if (!Omid.isActive()) {
+            Log.w(OMConstants.logTag, "OM session creation skipped because the SDK is not active")
+            return null
+        }
+
+        val partner = partner
+        if (partner == null) {
+            return null
+        }
+
+        return try {
+            val context = AdSessionContext.createHtmlAdSessionContext(
+                partner,
+                webView,
+                contentUrl,
+                "",
+            )
+            val (omCreativeType, mediaEventsOwner) = when (creativeType) {
+                OMCreativeType.DISPLAY -> CreativeType.HTML_DISPLAY to Owner.NONE
+                OMCreativeType.VIDEO -> CreativeType.VIDEO to Owner.JAVASCRIPT
+            }
+            val configuration = AdSessionConfiguration.createAdSessionConfiguration(
+                omCreativeType,
+                ImpressionType.BEGIN_TO_RENDER,
+                Owner.JAVASCRIPT,
+                mediaEventsOwner,
+                false,
+            )
+            val session = AdSession.createAdSession(configuration, context).apply {
+                registerAdView(webView)
+            }
+            OMSession(session = session, webView = webView)
+        } catch (exception: IllegalArgumentException) {
+            Log.e(OMConstants.logTag, "OM session creation failed", exception)
+            null
+        } catch (exception: IllegalStateException) {
+            Log.e(OMConstants.logTag, "OM session creation failed", exception)
+            null
+        }
+    }
+}
diff --git a/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMRetentionPool.kt b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMRetentionPool.kt
new file mode 100644
index 00000000..5fbf4742
--- /dev/null
+++ b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMRetentionPool.kt
@@ -0,0 +1,24 @@
+package so.kontext.sdk.flutter.omsdk
+
+import android.os.Handler
+import android.os.Looper
+import java.util.UUID
+
+internal object OMRetentionPool {
+    private val mainHandler = Handler(Looper.getMainLooper())
+    private val retainedWebViews = mutableMapOf<String, OMRetainedWebView>()
+
+    fun retain(
+        webView: OMRetainedWebView,
+        delayMillis: Long = OMConstants.retentionIntervalMillis,
+    ) {
+        val id = UUID.randomUUID().toString()
+        retainedWebViews[id] = webView
+        mainHandler.postDelayed(
+            {
+                retainedWebViews.remove(id)?.destroy()
+            },
+            delayMillis,
+        )
+    }
+}
diff --git a/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMSDKPlugin.kt b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMSDKPlugin.kt
new file mode 100644
index 00000000..69493b24
--- /dev/null
+++ b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMSDKPlugin.kt
@@ -0,0 +1,28 @@
+package so.kontext.sdk.flutter.omsdk
+
+import android.content.Context
+import io.flutter.embedding.engine.plugins.FlutterPlugin
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel
+
+class OMSDKPlugin : FlutterPlugin, MethodChannel.MethodCallHandler {
+    private lateinit var channel: MethodChannel
+    private lateinit var context: Context
+
+    override fun onAttachedToEngine(binding: FlutterPlugin.FlutterPluginBinding) {
+        context = binding.applicationContext
+        channel = MethodChannel(binding.binaryMessenger, OMConstants.channelName)
+        channel.setMethodCallHandler(this)
+    }
+
+    override fun onMethodCall(call: MethodCall, result: MethodChannel.Result) {
+        when (call.method) {
+            "activate" -> result.success(OMManager.activate(context))
+            else -> result.notImplemented()
+        }
+    }
+
+    override fun onDetachedFromEngine(binding: FlutterPlugin.FlutterPluginBinding) {
+        channel.setMethodCallHandler(null)
+    }
+}
diff --git a/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMSession.kt b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMSession.kt
new file mode 100644
index 00000000..7c9a9dfe
--- /dev/null
+++ b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/OMSession.kt
@@ -0,0 +1,54 @@
+package so.kontext.sdk.flutter.omsdk
+
+import android.util.Log
+import android.view.ViewGroup
+import android.webkit.WebView
+import com.iab.omid.library.kontextso.adsession.AdSession
+import com.iab.omid.library.kontextso.adsession.ErrorType
+
+internal class OMSession(
+    private val session: AdSession,
+    private val webView: WebView,
+) {
+    fun start() {
+        session.start()
+    }
+
+    fun retire() {
+        try {
+            webView.evaluateJavascript("window.postMessage({ type: 'retire-iframe' }, '*');", null)
+        } catch (exception: Throwable) {
+            Log.w(OMConstants.logTag, "OM retire message failed", exception)
+        }
+    }
+
+    fun finish() {
+        session.finish()
+    }
+
+    fun logError(errorType: String?, message: String?) {
+        val omErrorType = if (errorType == "video") ErrorType.VIDEO else ErrorType.GENERIC
+        try {
+            session.error(omErrorType, message ?: "unknown")
+        } catch (exception: IllegalStateException) {
+            Log.e(OMConstants.logTag, "OM error logging failed", exception)
+        }
+    }
+
+    fun retainedWebView(): OMRetainedWebView = OMRetainedWebView(webView)
+}
+
+internal class OMRetainedWebView(
+    private val webView: WebView,
+) {
+    fun destroy() {
+        try {
+            (webView.parent as? ViewGroup)?.removeView(webView)
+            webView.stopLoading()
+            webView.loadUrl("about:blank")
+            webView.destroy()
+        } catch (exception: Throwable) {
+            Log.w(OMConstants.logTag, "Deferred WebView destroy failed", exception)
+        }
+    }
+}
diff --git a/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/WebViewOMLifecycle.kt b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/WebViewOMLifecycle.kt
new file mode 100644
index 00000000..1e392e43
--- /dev/null
+++ b/android/src/main/kotlin/so/kontext/sdk/flutter/omsdk/WebViewOMLifecycle.kt
@@ -0,0 +1,154 @@
+package so.kontext.sdk.flutter.omsdk
+
+import android.os.SystemClock
+import android.util.Log
+import android.webkit.WebView
+
+internal class WebViewOMLifecycle(
+    private val webView: WebView,
+    private val initialContentUrl: String?,
+    initialCreativeType: OMCreativeType?,
+    private val canUseOpenMeasurement: () -> Boolean,
+    private val logUnsupportedOpenMeasurement: () -> Unit,
+) {
+    private var activeOMSession: OMSession? = null
+    private var hasDeferredDestroy = false
+    private var hasLoadedPage = false
+    private var hasLoggedUnsupportedOpenMeasurement = false
+    private var lastContentUrl: String? = initialContentUrl
+    private var lastOpenMeasurementFinishTimestampMillis: Long? = null
+    private var omCreativeType: OMCreativeType? = initialCreativeType
+    private var pendingOpenMeasurementStart = false
+
+    init {
+        if (omCreativeType != null && !canUseOpenMeasurement()) {
+            maybeLogUnsupportedOpenMeasurement()
+            omCreativeType = null
+        }
+    }
+
+    fun configure(creativeTypeRaw: String?) {
+        val parsedCreativeType = OMCreativeType.fromRawValue(creativeTypeRaw)
+        if (parsedCreativeType != null && !canUseOpenMeasurement()) {
+            maybeLogUnsupportedOpenMeasurement()
+            omCreativeType = null
+            return
+        }
+
+        omCreativeType = parsedCreativeType
+        startOpenMeasurementSessionIfReady()
+    }
+
+    fun markPageStarted(url: String?) {
+        hasLoadedPage = false
+        lastContentUrl = url ?: initialContentUrl
+    }
+
+    fun markPageFinished(url: String?) {
+        hasLoadedPage = true
+        lastContentUrl = url ?: initialContentUrl
+        startOpenMeasurementSessionIfReady()
+    }
+
+    fun requestStart() {
+        if (!canUseOpenMeasurement()) {
+            if (omCreativeType != null) {
+                maybeLogUnsupportedOpenMeasurement()
+            }
+            return
+        }
+
+        pendingOpenMeasurementStart = true
+        startOpenMeasurementSessionIfReady()
+    }
+
+    fun logError(errorType: String?, message: String?) {
+        activeOMSession?.logError(errorType = errorType, message = message)
+    }
+
+    fun finish() {
+        pendingOpenMeasurementStart = false
+
+        val activeOMSession = activeOMSession ?: return
+        this.activeOMSession = null
+        activeOMSession.retire()
+        activeOMSession.finish()
+        lastOpenMeasurementFinishTimestampMillis = SystemClock.uptimeMillis()
+    }
+
+    fun dispose(): Boolean {
+        if (hasDeferredDestroy) {
+            return true
+        }
+
+        val remainingOpenMeasurementRetentionMillis = remainingOpenMeasurementRetentionMillis()
+        if (remainingOpenMeasurementRetentionMillis <= 0L) {
+            return false
+        }
+
+        hasDeferredDestroy = true
+        OMRetentionPool.retain(
+            webView = OMRetainedWebView(webView),
+            delayMillis = remainingOpenMeasurementRetentionMillis,
+        )
+        return true
+    }
+
+    private fun startOpenMeasurementSessionIfReady() {
+        if (activeOMSession != null || hasDeferredDestroy) {
+            return
+        }
+
+        if (!pendingOpenMeasurementStart) {
+            return
+        }
+
+        val omCreativeType = omCreativeType ?: return
+        if (!hasLoadedPage) {
+            return
+        }
+
+        if (!canUseOpenMeasurement()) {
+            maybeLogUnsupportedOpenMeasurement()
+            pendingOpenMeasurementStart = false
+            return
+        }
+
+        if (!OMManager.activate(webView.context)) {
+            return
+        }
+
+        val session = OMManager.createSession(
+            webView = webView,
+            contentUrl = lastContentUrl ?: webView.url?.toString() ?: initialContentUrl,
+            creativeType = omCreativeType,
+        ) ?: run {
+            pendingOpenMeasurementStart = false
+            return
+        }
+
+        try {
+            session.start()
+            activeOMSession = session
+            lastOpenMeasurementFinishTimestampMillis = null
+            pendingOpenMeasurementStart = false
+        } catch (exception: IllegalStateException) {
+            Log.e(OMConstants.logTag, "OM session start failed", exception)
+            pendingOpenMeasurementStart = false
+        }
+    }
+
+    private fun maybeLogUnsupportedOpenMeasurement() {
+        if (hasLoggedUnsupportedOpenMeasurement) {
+            return
+        }
+        hasLoggedUnsupportedOpenMeasurement = true
+        logUnsupportedOpenMeasurement()
+    }
+
+    private fun remainingOpenMeasurementRetentionMillis(): Long {
+        val finishedAt = lastOpenMeasurementFinishTimestampMillis ?: return 0L
+        val elapsedMillis = SystemClock.uptimeMillis() - finishedAt
+        return (OMConstants.retentionIntervalMillis - elapsedMillis).coerceAtLeast(0L)
+    }
+}
diff --git a/android/src/main/res/raw/omsdk_v1.js b/android/src/main/res/raw/omsdk_v1.js
new file mode 100644
index 00000000..c84aeb27
--- /dev/null
+++ b/android/src/main/res/raw/omsdk_v1.js
@@ -0,0 +1,99 @@
+;(function(omidGlobal) {
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+function Lc(a,b,c,d,e,f,h){h=hc(a.i,h);var k=2<=h.g.v.g?{R:!1,reason:'SESSION_ATTESTATION_LIMIT_EXCEEDED'}:h.g.v.h.has(f)?{R:!1,reason:'TOO_MANY_REQUESTS'}:.5<=Math.random()?{R:!1,reason:'SAMPLING_REJECTED'}:{R:!0,reason:null};h.g.v.h.add(f);if(k.R)if(h.g.v.g++,f=h.g.adSessionId,'ApplePAT'===b)Xa(a.g,d.Oa,e);else try{a={};for(var g in d)d.hasOwnProperty(g)&&(a[g.toLowerCase()]=d[g]);var l=tc('omidJsAttestationListener');if(l)l.postMessage(JSON.stringify({method:'attest',data:{adSessionId:f,mechanism:b,
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+function Oc(a){for(var b=L().i,c=p(b.keys()),d=c.next();!d.done;d=c.next()){d=d.value;var e=b.get(d);if(e){if(e.contentWindow===a)return d;try{if(e.contentWindow.Object.prototype.isPrototypeOf(a))return d}catch(f){}}}};function Pc(a){var b={};return(b.app='omid_v1_present_app',b.web='omid_v1_present_web',b)[a]}function Qc(a,b){a.document.write('<iframe style="display:none" id="'+(b+'" name="'+b+'" sandbox></iframe>'))}function Rc(a,b){var c=a.document.createElement('iframe');c.id=b;c.name=b;c.style.display='none';c.sandbox='';a.document.body.appendChild(c)}
+function dd(a,b){var c=new MutationObserver(function(d){d.forEach(function(e){'BODY'===e.addedNodes[0].nodeName&&(e=Pc(b),Rc(a,'omid_v1_present'),Rc(a,e),c.disconnect())})});c.observe(a.document.documentElement,{childList:!0})};var Hc=new Sa,wc=new function(){this.i=Hc;this.h=new Map;this.g=ic(this)},Dc=new vc;new Gc;K.omidBridge=new Z;new Cc;(function(a,b){a.frames&&a.document&&!['omid_v1_present','omid_v1_present_web','omid_v1_present_app'].some(function(c){return!!a.frames[c]})&&(null==a.document.body&&'MutationObserver'in a?dd(a,b):(b=Pc(b),a.document.body?(Rc(a,'omid_v1_present'),Rc(a,b)):(Qc(a,'omid_v1_present'),Qc(a,b))))})(K,'app');
+}).call(this, this);
+
diff --git a/lib/src/services/omsdk_service.dart b/lib/src/services/omsdk_service.dart
index c4d97527..d001785a 100644
--- a/lib/src/services/omsdk_service.dart
+++ b/lib/src/services/omsdk_service.dart
@@ -8,7 +8,7 @@ class OMSDKService {
   static const MethodChannel _channel = MethodChannel('kontext_flutter_sdk/omsdk');
 
   static Future<bool> activate() async {
-    if (!Platform.isIOS) {
+    if (!Platform.isIOS && !Platform.isAndroid) {
       return false;
     }
 
diff --git a/lib/src/widgets/ads_provider.dart b/lib/src/widgets/ads_provider.dart
index 8b4ac972..09c9f6c7 100644
--- a/lib/src/widgets/ads_provider.dart
+++ b/lib/src/widgets/ads_provider.dart
@@ -167,9 +167,7 @@ class AdsProvider extends HookWidget {
     }, const []);
 
     useEffect(() {
-      if (Platform.isIOS) {
-        unawaited(OMSDKService.activate());
-      }
+      unawaited(OMSDKService.activate());
       return null;
     }, const []);