To use reCAPTCHA in Android apps, you need to use a reCAPTCHA v2 ("Checkbox") key from the reCAPTCHA Admin Console.

There is no separate "Android" key type — just create a v2 key (Checkbox type), and it works with SafetyNet.getClient(...).verifyWithRecaptcha(siteKey).

Steps:

1. Go to reCAPTCHA Admin Console.

2. Select reCAPTCHA v2 → "I'm not a robot" Checkbox.

3. Leave domains blank (Android doesn’t use them).

4. Use the site key in your app and the secret key on your backend.

Can I use a Web key?

Yes. The v2 Checkbox key works for both web and Android (via SafetyNet).

Note:

• verifyWithRecaptcha() is deprecated. Consider migrating to the Play Integrity API in the future.