Finally, Google’s latest product, Android Device Manager for tracking your Android device is now available as an app for your Android devices. Earlier you were restricted to track your device via web application only but now you can track from another Android Device using its Android App. You can download from the source link on the bottom.
So now you can lock, access location of your device using an app on your Android. After downloading it from the Play Store, it is there in your app drawer, allowing you to find any Android device registered to your Google account from that device, lock it, erase it, or tell it to make a loud sound.
The App is now available for download from the Play Store.
Source: Play Link