Nope, its not an app, but a service similar to Apple’s iCloud, and it’s Google’s Android Device Manager, which allows you to locate your misplaced Android device and has features such as sending notifications and erasing your Android device.
No registration required, just have a Google Account and make sure it is signed in on your Android device, and visit www.android.com/devicemanager to check out this feature. You know, Google should have implemented this kind of stuffs years back. Don’t you think? Share with us your experience on Google Device Manager in the comments down below