- For iOS, [Matt Rubin's MIT-licensed Authenticator app](https://mattrubin.me/authenticator).
- For Android, [andOTP](https://github.com/andOTP/andOTP).
- For iOS, [Matt Rubin's MIT-licensed Authenticator app](https://mattrubin.me/authenticator).
- For Android, [andOTP](https://github.com/andOTP/andOTP).