Nok Nok™ Passport is an authentication app designed for Android devices. It is developed by Nok Nok Labs Inc. and is available for free. 

Passport provides users with a streamlined way to authenticate on selected websites using diverse methods. Aligned with the FIDO Alliance's UAF protocol, the app allows Android devices to be registered by scanning QR codes, utilizing fingerprint identification, or entering a PIN. After registration, users can authenticate in a similar manner or through push notifications. This innovative solution enhances online account security without the dependency on passwords or additional hardware tools.

The app supports FIDO UAF-enabled devices, such as the Samsung Galaxy S® 6, Fujitsu Arrows NX, or Sharp Aquos Zeta, and also non-FIDO-enabled devices. The app has a simple and user-friendly interface, making it easy for users to enroll and authenticate.