diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index 25895b98..a57d1d1c 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -43,7 +43,7 @@
 
         <meta-data
             android:name="android.telephony.PROPERTY_SATELLITE_DATA_OPTIMIZED"
-            android:value="com.rtbishop.look4sat" />
+            android:value="com.rtbishop.look4sat.bg7nta" />
 
     </application>
 </manifest>
diff --git a/build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/PluginSetupUtils.kt b/build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/PluginSetupUtils.kt
index 334a9308..6126a2d0 100644
--- a/build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/PluginSetupUtils.kt
+++ b/build-logic/convention/src/main/java/com/rtbishop/look4sat/convention/PluginSetupUtils.kt
@@ -57,7 +57,7 @@ internal fun Project.setupAndroidApp() {
         namespace = libs.versions.packageName.get()
         compileSdk = libs.versions.compileSdk.get().toInt()
         defaultConfig {
-            applicationId = libs.versions.packageName.get()
+            applicationId = libs.versions.applicationId.get()
             minSdk = libs.versions.minSdk.get().toInt()
             versionCode = libs.versions.appVersionCode.get().toInt()
             versionName = libs.versions.appVersionName.get()
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 6f817fc0..a126fec4 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -11,6 +11,11 @@ minSdk = "24"
 jdkVersion = "21"
 #noinspection UnusedVersionCatalogEntry
 packageName = "com.rtbishop.look4sat"
+# Fork application ID: official app uses com.rtbishop.look4sat with a different
+# signing cert. Installing a fork with the same applicationId would conflict
+# with the official build (signature mismatch / cannot overwrite), so the fork
+# ships under its own applicationId suffix.
+applicationId = "com.rtbishop.look4sat.bg7nta"
 
 android-gradle-plugin = "9.3.1"