4OTP

What 4OTP is

4OTP generates six-digit time-based one-time passwords that refresh every 30 seconds to help protect online accounts. It is available on Windows, macOS, iOS, and Android, and its apps can be used offline without an account. The app supports searching, pinning, and renaming codes, as well as automatic icons, next-code display, and recovery of deleted codes. Codes can be imported from Google Authenticator and exported to Google Authenticator or compatible apps. Encrypted backup files can be restored on another device. The maker says local data is encrypted with a password-derived key and AES-GCM, while Sync uses end-to-end encryption. Sync supports up to 50 devices, keeps the last 50 changes, and lets users revert to an earlier code-list version. Free apps include encrypted local storage, backups, and offline use. The optional Sync plan costs US$36 per year. The maker says it cannot decrypt codes without the password, so a forgotten password means losing access to them.