Openticator generates 2-step verification codes to protect your accounts with your password and your device.
Why Openticator is the best multi-factor authentication app:
Offline: Tired of waiting for an SMS to arrive? Openticator generates secure tokens without connectivity so you can authenticate securely even when in airplane mode.
Secure: All data is encrypted using 256-bit AES encryption.
All of your accounts: Supports most major multifactor authentication accounts as GitHub, Facebook, Dropbox, Amazon, Google, etc.
Organization: Group your accounts with many categories as you want.
Customization: You can choose or change account logos anytime.
Open Source: It is open-source, you can download and check the code on GitHub!
PIN screen to add even more security.