The Authenticator App Pro, a free two-factor authentication tool, generates push authentication and time-based one-time passwords (TOTP). Multi Factor Authenticator is maintaining the security of your online accounts on websites that use TOTP. Since the created codes are one-time tokens, they increase the level of security for your online accounts. You may safeguard your account by simply scanning a QR code. Using 2FA Authenticator on websites that allow TOTP helps protect your online accounts.