diff --git a/FIREBASE_SETUP.md b/FIREBASE_SETUP.md
index 4ef322a..8af4aac 100644
--- a/FIREBASE_SETUP.md
+++ b/FIREBASE_SETUP.md
@@ -11,7 +11,7 @@
 ## Step 2: Add Android App
 
 1. In Firebase Console, click the Android icon to add an Android app
-2. Enter package name: `com.example.sage` (must match AndroidManifest.xml)
+2. Enter package name: `com.github.mystiatech.sage` (must match exactly!)
 3. App nickname: `Sage` (optional)
 4. Debug signing certificate SHA-1: (optional, skip for now)
 5. Click "Register app"
diff --git a/android/app/README_FIREBASE.md b/android/app/README_FIREBASE.md
index f8e14a8..7b7f091 100644
--- a/android/app/README_FIREBASE.md
+++ b/android/app/README_FIREBASE.md
@@ -15,7 +15,7 @@ The current `google-services.json` file is a **PLACEHOLDER** and will **NOT** wo
 
 ### Package Name (must match):
 ```
-com.sage.sage
+com.github.mystiatech.sage
 ```
 
 Without the real Firebase configuration file, household sharing will not work across devices!
diff --git a/android/app/build.gradle.kts b/android/app/build.gradle.kts
index 5b98b50..eaae696 100644
--- a/android/app/build.gradle.kts
+++ b/android/app/build.gradle.kts
@@ -7,7 +7,7 @@ plugins {
 }
 
 android {
-    namespace = "com.sage.sage"
+    namespace = "com.github.mystiatech.sage"
     compileSdk = flutter.compileSdkVersion
     ndkVersion = flutter.ndkVersion
 
@@ -21,8 +21,7 @@ android {
     }
 
     defaultConfig {
-        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
-        applicationId = "com.sage.sage"
+        applicationId = "com.github.mystiatech.sage"
         // You can update the following values to match your application needs.
         // For more information, see: https://flutter.dev/to/review-gradle-config.
         minSdk = flutter.minSdkVersion  // Firebase requires minSdk 21
diff --git a/android/app/google-services.json b/android/app/google-services.json
index 8813823..abd877a 100644
--- a/android/app/google-services.json
+++ b/android/app/google-services.json
@@ -9,7 +9,7 @@
       "client_info": {
         "mobilesdk_app_id": "1:PLACEHOLDER:android:PLACEHOLDER",
         "android_client_info": {
-          "package_name": "com.sage.sage"
+          "package_name": "com.github.mystiatech.sage"
         }
       },
       "oauth_client": [],
diff --git a/android/app/src/main/kotlin/com/sage/sage/MainActivity.kt b/android/app/src/main/kotlin/com/github/mystiatech/sage/MainActivity.kt
similarity index 72%
rename from android/app/src/main/kotlin/com/sage/sage/MainActivity.kt
rename to android/app/src/main/kotlin/com/github/mystiatech/sage/MainActivity.kt
index 7b6a30b..c8e7170 100644
--- a/android/app/src/main/kotlin/com/sage/sage/MainActivity.kt
+++ b/android/app/src/main/kotlin/com/github/mystiatech/sage/MainActivity.kt
@@ -1,4 +1,4 @@
-package com.sage.sage
+package com.github.mystiatech.sage
 
 import io.flutter.embedding.android.FlutterActivity