> For the complete documentation index, see [llms.txt](https://coinplus.gitbook.io/help-center/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://coinplus.gitbook.io/help-center/app-security/how-to-turn-on-the-app-passcode.md).
# How to turn on the App passcode
In order to increase your Coinplus data security, you can set a passcode lock on your app, and it will ask for the passcode every time you enter the app. If your device supports biometric authentication(Face id, Touch id), you can use your it as well instead of your passcode.
It's **highly recommended** to always turn on the passcode on the app.
**Step 1**
* Go to the **Settings tab**
* Enable the **App lock**
**Step 2**
* Enter a **6-digit passcode**
* **Confirm** the passcode you wrote
Biometric authentication will be turned on by default.
In case of any questions feel free to get in touch with us at 🚀
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