Authenticator Plus is described as 'Generates 2-step verification codes to protect your accounts with your password and phone / tablet' and is a Authenticator in the security & privacy category. There are more than 25 alternatives to Authenticator Plus for a variety of platforms, including Android, iPhone, Android Tablet, iPad and Mac apps. The best Authenticator Plus alternative is Aegis Authenticator, which is both free and Open Source. Other great apps like Authenticator Plus are 2FA Authenticator (2FAS), Authy, Google Authenticator and andOTP.