What are some alternatives?
When comparing andOTP and Aegis Authenticator, you can also consider the following products
Authy - Best rated Two-Factor Authentication smartphone app for consumers, simplest 2fa Rest API for developers and a strong authentication platform for the enterprise.
FreeOTP - Open source implementation of the two-factor authentication HOTP and TOTP schemes.
Google Authenticator - Google Authenticator is a multifactor app for mobile devices.
YubiKey - The YubiKey is a one-time password device for secure login with two-factor authentication
WinAuth - Portable open-source Authenticator for Windows
Microsoft Authenticator - One app to quickly and securely verify your identity online, for all of your accounts.