2FAS
2FA codes on iOS and Android. Open source, no account, no cloud.
Description
2FAS generates your two-factor authentication codes without creating an account or sending data to the cloud. The app is open source, independently audited, and syncs between devices via encrypted iCloud or Google Drive. Recommended by Privacy Guides since Raivo OTP was removed.
Strengths
- Open source and independently audited
- No account required, codes stay on your device
- Works on iOS and Android
- Browser extension for auto-fill
Limitations
- Cross-device sync via iCloud/Google Drive only
- Less well-known than legacy alternatives
Recommended for
- Replacing Google Authenticator or Raivo OTP
- Users looking for a simple, open source authenticator
Compared to alternatives
2FAS is the simplest choice for 2FA: no account, no mandatory cloud. Aegis offers more control (Android only), Proton Authenticator integrates with the Proton ecosystem.