Yubico Authenticator allows you to use a YubiKey to store OATH credentials (TOTP and HOTP supported, as used by Google, Microsoft, Dropbox, Amazon and many more) used for 2-factor authentication.

Storing the credentials on an OATH enabled YubiKey ensures that your credentials are safe, even if your phone is compromised.
It also makes it easy to move between multiple Android devices.
From version Yubico Authenticator 2.2.0-rc1:
* Add support for reading NDEF data (Yubico OTP, etc).
* Add support for NFC in "reader mode" (better compatibility for some phones).
* Update to target API 28 (Android Pie), and use AndroidX.
* Replace embedded QR code reader with Google Play Services, with fallback to external scanner.
All versions
September 24, 2018
December 29, 2017