A free app for Android, by it8Apps.

Security is one of the most important things to keep your devices safe. Unfortunately, a lot of people forget their passwords or patterns, making it easy for an intruder to access their personal information. In the event of a security breach, you need to be able to identify who had access to your phone and what they did with your information.

This app lets you do just that. If you set it up correctly, it will start alerting you when someone tries to access your phone with a wrong password. In the event of a breach, it will also send you a photo of the intruder, so you can identify them.