Cisco Duo Mobile

Operating systems: Android, iOS

Duo Mobile, acquired by Cisco in 2018, is one of the oldest authenticator apps. Its main advantage is a clean, user-friendly interface. Duo Mobile also hides codes from view and does not require an account. However, the software lacks other important features: first and foremost, access protection, which neither the iOS nor the Android version has.

Duo Mobile uses two systems for cloud backup: Google Cloud on the Android platform and iCloud on the iOS platform. The smartphone user’s existing Google and Apple accounts serve for that, meaning users do not have to create a new account for the app to work. However, users cannot sync data between Android and iOS versions, the app does not support file export, and there is no option to view a secret key or QR code for tokens that are already saved (which could be helpful if you need to do a manual sync).
 

Pros:

• Clean, user-friendly interface,
• Ability to hide codes,
• No need to create an account,
• Cloud backup/sync,
• Apple Watch support (iOS version).

Cons:

• No access protection,
• Inability to export or import tokens,
• Incompatible backup/sync systems for iOS and Android.

Summary
Cisco Duo Mobile may meet your needs if you use, and plan always to use, only one mobile operating system.