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 Bitwarden, which is both free and Open Source. Other great apps like FreeOTP are KeePass, Aegis Authenticator, Proton Authenticator and Ente Auth.