> For the complete documentation index, see [llms.txt](https://docs.leather.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.leather.io/settings-and-customization/mobile-app-authentication.md).

# Configure App Authentication in Leather Mobile App

Require your phone's PIN, Face ID or fingerprint to open the Leather mobile app.

With app authentication on, the Leather mobile app asks for your phone's own unlock method, such as a PIN, Face ID or a fingerprint.

## Turn app authentication on or off

1. Tap the settings icon in the top right corner.
2. Select "Security".
3. Tap "App authentication" and switch it on or off.

The app uses the methods already set up on your phone.