A free app for Android, by Mitzz Apps.
AppLock: Fingerprint Lock is an app that will help you protect your privacy. If you have some private photos or videos that you don't want to share with anyone, this is the best way to lock them down. You can easily create a PIN to access your photos and videos, or you can use a fingerprint scanner if you have a fingerprint. The AppLock app is also the best way to get notified if someone tries to break into your app with the wrong password. You can get notified immediately and take a picture of the intruder, ensuring 100% privacy protection.
The AppLock app also has an option to automatically capture photos of anyone who tries to break into your app with the wrong password.
