Authenticator Apps
This application supports any TOTP-compatible authenticator app. Here are the most popular options:
Recommended Apps
| App | Platforms | Features |
|---|---|---|
| Google Authenticator | iOS, Android | Simple, widely supported |
| Microsoft Authenticator | iOS, Android | Cloud backup, push notifications for Microsoft accounts |
| Authy | iOS, Android, Desktop | Multi-device sync, encrypted cloud backup |
| 1Password | iOS, Android, Desktop | Integrated with password manager |
TOTP Standard
All these apps implement the TOTP (Time-based One-Time Password) standard defined in RFC 6238. This means:
- 6-digit codes
- Codes change every 30 seconds
- Works offline (no internet required)
- Compatible with any TOTP-supporting service
QR Code Setup
Users set up 2FA by scanning a QR code with their authenticator app. The QR code contains a URI in this format:
otpauth://totp/AppName:user@email.com?secret=BASE32SECRET&issuer=AppName