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Configure Google Cloud Console and Supabase so Google sign-in works in your Android APK. This guide covers creating OAuth credentials, configuring Supabase, and updating your app configuration.
APK only: When Google auth is configured through Supabase, Google sign-in will not work in Rocket’s preview or in published web apps. It will only work in a downloaded APK installed on a real device or emulator.

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Your SHA-1 Certificate Fingerprint

Rocket generates a unique SHA-1 fingerprint for your app. You will need it in Step 1c below. To find it:
1

Open the Launch popup

In your Rocket project, click Launch in the top-right corner.
2

Go to the APK tab

Click the APK tab.
3

Copy the SHA-1 key

Your SHA-1 key is shown at the top of the tab. Click the copy icon next to it.
Use copy-paste only - do not type this manually. A single wrong character will prevent users from signing in.
APK tab in the Rocket Launch popup showing the SHA-1 certificate fingerprint with a copy button.APK tab in the Rocket Launch popup showing the SHA-1 certificate fingerprint with a copy button.

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Step 1 - Google Cloud Console

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1a. Create or select your project

1

Open Google Cloud Console

Go to console.cloud.google.com and sign in.
2

Select or create a project

Click the project selector at the top of the page. Select your existing project, or click New Project, give it a name, and click Create.
This is the screen your users see when Google asks for permission to share their account details with your app.
1

Open OAuth consent screen

In the sidebar, go to APIs & Services > OAuth consent screen and click Get Started.
2

Fill in app details

Fill in App name and User support email, then click Next.
3

Select user type

Select External and click Next.
4

Add developer contact

Fill in your Developer contact email and click Next.
5

Create the consent screen

Click Create.
Leave the app in Testing mode for now. Add your own Google account as a test user so you can sign in during testing.

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1c. Create the Android OAuth Client ID

This credential identifies your app to Google during sign-in.
1

Create a new OAuth client ID

Go to APIs & Services > Credentials and click + Create Credentials > OAuth client ID.
2

Set application type to Android

Set Application type to Android.
3

Fill in the credential details

Fill in the following:
FieldValue
Namee.g. MyApp Android
Package nameCopy the namespace value from android/app/build.gradle.kts in your project (e.g. com.example.zebralover)
SHA-1 certificate fingerprintPaste the value you copied from Rocket’s Launch tab (see above)
4

Save the credential

Click Create, then OK.

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1d. Create the Web OAuth Client ID

Supabase requires a separate Web Client ID to handle authentication on your behalf.
1

Create a new OAuth client ID

Click + Create Credentials > OAuth client ID again.
2

Set application type to Web

Set Application type to Web application. Name it e.g. MyApp Web (Supabase).
3

Add the redirect URI

Under Authorised redirect URIs, click + Add URI and enter:
https://<your-project-ref>.supabase.co/auth/v1/callback
Replace <your-project-ref> including < and > with your Project ID, found in Supabase under Settings > General.
4

Create and copy credentials

Click Create. A dialog shows your Client ID and Client Secret. Copy and save both values - you will need them in Step 2.
Keep your Client Secret private. Never share it publicly or include it in your app’s code.

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Step 2 - Configure Supabase

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2a. Enable Google Sign-In

1

Open your Supabase project

Log in to supabase.com and open your project.
2

Navigate to Providers

Go to Authentication > Providers in the sidebar.
3

Enable Google sign-in

Find Google, click to expand it, and toggle Enable sign in with Google to ON.
4

Enter credentials and save

Paste the Web Client ID and Client Secret you saved in Step 1d. Click Save.

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2b. Add the redirect URL

1

Open URL Configuration

In the sidebar, go to Authentication > URL Configuration.
2

Add the redirect URL

Under Redirect URLs, click Add URL and enter:
com.yourcompany.appname://login-callback
Replace com.yourcompany.appname with your namespace value from android/app/build.gradle.kts.
3

Save the configuration

Click Save.

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Step 3 - Update Your App Configuration

In Rocket, open Code and find env.json in the root folder of your project. Find the GOOGLE_WEB_CLIENT_ID field and replace the placeholder with the Web Client ID you copied in Step 1d. 
{
    "SUPABASE_URL": "...",
    "SUPABASE_ANON_KEY": "...",
    "OPENAI_API_KEY": "...",
    "GEMINI_API_KEY": "...",
    "ANTHROPIC_API_KEY": "...",
    "PERPLEXITY_API_KEY": "...",
    "GOOGLE_WEB_CLIENT_ID": "your_google_web_client_id"
}
Paste the Web Client ID exactly as copied from the Step 1d dialog. It ends with .apps.googleusercontent.com.

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You Are All Set

Go back to Rocket, click Build APK, and download your APK once the build is complete.

Google sign-in is ready

Google Cloud Console, Supabase, and your app are configured. Google sign-in will now work in your APK.

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What’s next?

Social auth

Add more OAuth providers like GitHub, Apple, or Discord.

Supabase overview

See all Supabase features available in Rocket.