Wikipedia - Time-based one-time password
TOTP tokens on my wrist with the smartest dumb watch
PCMag - The Best Authenticator Apps for 2025
Stratum (formerly Authenticator Pro)
2FA
- something you know = password
- something you have = physical security key or TOTP via authenticator app on you
Android - use privacy feature Private Space to isolate TOTP authenticator app from all other apps
Android Help - Hide sensitive apps with private space