Protecting access on your device
App lock can require you to unlock Zuko again after time away from the app. Where your device supports it, biometric unlock can make that step quicker while helping protect access.
Use a device passcode and keep your device software current as part of your overall account security.
If you share a device
App lock is particularly useful if your phone may be picked up by another person. It does not replace the security settings on the device itself.