Cost / License
- Free
- Open Source
Platforms
- iPhone
- iPad



FreeOTP is described as 'Two-factor authentication application for systems utilizing one-time password protocols with support for Android (6 or later) and iOS (11 or later). Tokens can be added easily by scanning a QR-code or by manually entering in the token configuration' and is a popular Authenticator in the security & privacy category. There are more than 50 alternatives to FreeOTP for a variety of platforms, including iPhone, Android, iPad, Android Tablet and Mac apps. The best FreeOTP alternative is KeePass, which is both free and Open Source. Other great apps like FreeOTP are Aegis Authenticator, Ente Auth, Proton Authenticator and Bitwarden Authenticator.



The app for calculating one-time-passwords on iPhone and iPad. OTP Auth can be used with any service that uses one time passwords. This includes services like Dropbox and GMail with two-step-verfification enabled. OTP Auth is QR code enabled.




LastPass Authenticator offers a unique one-tap password verification experience that no other authenticator app delivers.




SecKey provides one time passwords to be used with the two factor authentication of Dropbox, Google, Facebook, GitHub, Proton Mail and many more.




Authman helps you manage your 2-step authentication tokens on iOS, Android and desktop, and securely sync them between devices.



Duo Mobile works with Duo Security's two-factor authentication service to make logins more secure. The application generates passcodes for login and can receive push notifications for easy, one-tap authentication.



Sentinel is an elegant OTP Authenticator app for both iOS and MacOS. It relies only on the Apple's iCloud Keychain to share data across devices.




Step Two is a beautiful, modern two-step verification app. Never get locked out of your own accounts. Step Two uses iCloud to securely back up your two-step codes and make them available on all your devices. Security shouldn’t come at the expense of usability.




Invantive Authenticator is a two-step verification solution for use with TOTP-protected websites and products such as Exact Online. Made in Holland by a partner of Exact, awarded accountancy app partner of the year 2017.




Two-factor authentication app for Yandex accounts and also other QR-code based temporary codes for two-factor authentication



One-time password generator for RFC6238-based two-factor authentication that allows seamless transfer of one-time passwords from mobile phone to desktop browser via notification sounds.




