diff --git a/CHANGELOG.md b/CHANGELOG.md
index c090f2a762..54033f5b6d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 ### Fixes
 
+- Use `appLaunchedInForeground` to determine invalid app start data on Android ([#4146](https://github.com/getsentry/sentry-react-native/pull/4146))
 - Upload source maps for all release variants on Android (not only the last found) ([#4125](https://github.com/getsentry/sentry-react-native/pull/4125))
 
 ### Dependencies
diff --git a/RNSentryAndroidTester/app/src/test/java/io/sentry/react/RNSentryModuleImplTest.kt b/RNSentryAndroidTester/app/src/test/java/io/sentry/react/RNSentryModuleImplTest.kt
new file mode 100644
index 0000000000..5a6585ab80
--- /dev/null
+++ b/RNSentryAndroidTester/app/src/test/java/io/sentry/react/RNSentryModuleImplTest.kt
@@ -0,0 +1,96 @@
+package io.sentry.react
+
+import android.content.pm.PackageInfo
+import android.content.pm.PackageManager
+import com.facebook.react.bridge.Arguments
+import com.facebook.react.bridge.Promise
+import com.facebook.react.bridge.ReactApplicationContext
+import com.facebook.react.bridge.WritableMap
+import io.sentry.ILogger
+import io.sentry.SentryLevel
+import org.junit.After
+import org.junit.Assert.assertEquals
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+import org.mockito.ArgumentCaptor
+import org.mockito.Captor
+import org.mockito.Mockito.*
+import org.mockito.MockitoAnnotations
+import org.mockito.MockedStatic
+import org.mockito.Mockito.mockStatic
+import org.mockito.kotlin.whenever
+
+@RunWith(JUnit4::class)
+class RNSentryModuleImplTest {
+
+    private lateinit var module: RNSentryModuleImpl
+    private lateinit var promise: Promise
+    private lateinit var logger: ILogger
+    private var argumentsMock: MockedStatic<Arguments>? = null
+
+    @Captor
+    private lateinit var writableMapCaptor: ArgumentCaptor<WritableMap>
+
+    @Before
+    fun setUp() {
+        MockitoAnnotations.openMocks(this)
+        val reactContext = mock(ReactApplicationContext::class.java)
+        promise = mock(Promise::class.java)
+        logger = mock(ILogger::class.java)
+        val packageManager = mock(PackageManager::class.java)
+        val packageInfo = mock(PackageInfo::class.java)
+
+        whenever(reactContext.packageManager).thenReturn(packageManager)
+        whenever(packageManager.getPackageInfo(anyString(), anyInt())).thenReturn(packageInfo)
+
+        module = RNSentryModuleImpl(reactContext)
+
+        // Mock the Arguments class
+        argumentsMock = mockStatic(Arguments::class.java)
+        val writableMap = mock(WritableMap::class.java)
+        whenever(Arguments.createMap()).thenReturn(writableMap)
+    }
+
+    @After
+    fun tearDown() {
+        argumentsMock?.close()
+    }
+
+    @Test
+    fun `fetchNativeAppStart resolves promise with null when app is not launched in the foreground`() {
+        // Mock the app start measurement
+        val appStartMeasurement = mapOf<String, Any>()
+
+        // Call the method
+        module.fetchNativeAppStart(promise, appStartMeasurement, logger, false)
+
+        // Verify a warning log is emitted
+        verify(logger, org.mockito.kotlin.times(1)).log(
+            SentryLevel.WARNING,
+            "Invalid app start data: app not launched in foreground."
+        )
+
+        // Verify the promise is resolved with null
+        verify(promise).resolve(null)
+    }
+
+    @Test
+    fun `fetchNativeAppStart resolves promise with app start data when app is launched in the foreground`() {
+        // Mock the app start measurement
+        val appStartMeasurement = mapOf<String, Any>()
+
+        // Call the method
+        module.fetchNativeAppStart(promise, appStartMeasurement, logger, true)
+
+        // Verify no logs are emitted
+        verify(logger, org.mockito.kotlin.times(0)).log(any(), any())
+
+        // Verify the promise is resolved with the expected data
+        verify(promise).resolve(any(WritableMap::class.java))
+        verify(promise).resolve(writableMapCaptor.capture())
+        val capturedMap = writableMapCaptor.value
+        assertEquals(false, capturedMap.getBoolean("has_fetched"))
+    }
+}
diff --git a/android/src/main/java/io/sentry/react/RNSentryModuleImpl.java b/android/src/main/java/io/sentry/react/RNSentryModuleImpl.java
index e72549f034..cd498308f3 100644
--- a/android/src/main/java/io/sentry/react/RNSentryModuleImpl.java
+++ b/android/src/main/java/io/sentry/react/RNSentryModuleImpl.java
@@ -380,9 +380,17 @@ public void fetchNativeRelease(Promise promise) {
     }
 
     public void fetchNativeAppStart(Promise promise) {
-        final Map<String, Object> measurement = InternalSentrySdk.getAppStartMeasurement();
+        fetchNativeAppStart(promise, InternalSentrySdk.getAppStartMeasurement(), logger, AppStartMetrics.getInstance().isAppLaunchedInForeground());
+    }
+
+    protected void fetchNativeAppStart(Promise promise, final Map<String, Object> appStartMeasurement, ILogger logger, boolean isAppLaunchedInForeground) {
+        if (!isAppLaunchedInForeground) {
+            logger.log(SentryLevel.WARNING, "Invalid app start data: app not launched in foreground.");
+            promise.resolve(null);
+            return;
+        }
 
-        WritableMap mutableMeasurement = (WritableMap) RNSentryMapConverter.convertToWritable(measurement);
+        WritableMap mutableMeasurement = (WritableMap) RNSentryMapConverter.convertToWritable(appStartMeasurement);
         mutableMeasurement.putBoolean("has_fetched", hasFetchedAppStart);
 
         // This is always set to true, as we would only allow an app start fetch to only