Xiaomi
App Lock: Lock or Unlock Apps auf Xiaomi
App Lock on Xiaomi phones adds a separate lock screen for individual apps. Even if someone unlocks your phone with the main PIN or pattern, protected apps still require a second confirmation.
This matters most for apps holding private data: messaging, banking, photos or notes. Without App Lock active, anyone with access to the unlocked phone can open these apps freely.
Turn on App Lock
Go to Open the Settings ➔ Tap on Apps ➔ Tap on App lock ➔ Tap on Turn on. You are then asked to link the feature to your account: choose Not now or Add to connect your Mi Account, which lets you recover access if you forget the lock method.
After setup, MIUI shows Select suggested apps with commonly protected apps pre-checked. Confirm with Tap on Use App lock to apply the lock to those apps immediately.
Add or remove apps
To manage the full list, Swipe upwards to browse all apps and then Enable or disable other apps individually. Toggle any app on to require the extra unlock step, or off to remove it.
If your phone supports fingerprint or face recognition, you can usually use either method to open locked apps once App Lock is active, instead of typing a pattern or password each time.