Relying on just usernames and passwords to secure your online accounts is no longer considered safe. Data breaches occur daily and hackers are always inventing new ways to take over your accounts. Authy allows to use the TOTP mechanisms of double authentication for free.
Multiple Devices synchronization
Sync 2FA across mobile, tablet and desktop. Access your 2FA tokens on iOS, Android, and Chrome platforms.
Securely backup 2FA tokens and restore them if you lose your device. (With Google Authenticator, if you lose your phone, you are locked out of your accounts. Not so with Authy.)
Works offline so you can still login to 2FA secured websites.