Operates in the background only when a wrong code is entered, so it does not drain the battery.

Lockwatch is a security app that discreetly takes a photo of anyone who enters an incorrect PIN or pattern on your Android phone. It then emails you the photo along with the phone’s GPS location.

While the app is on the Google Play Store, downloading via "DZAPK" (third-party sites like Uptodown ) is common. Always ensure you are downloading from reputable, reputable sources to avoid malware. The app requires to work properly. If you'd like, I can: Tell you how to configure it for maximum security. Compare it to other top, free alternatives. Help you find the official store link to avoid malware. Let me know how you'd like to proceed. Lockwatch – Thief Catcher - Apps on Google Play

Alerts you if the SIM card is changed, which is useful if the thief attempts to prevent tracking.