This will only work for devices that have a magnetics sensor. Use your phone's built-in magnetics sensor to detect metals that distort the natural magnetic field. Technically speaking only metals that contain ferrimagnetic elements such as iron, nickel and cobalt will register variations onscreen.
The antivirus report shows that the app is completely safe. Metal Detector LCD is created by Dr Quiz and its category is Tools. This application was rated 3.6 on Google Play.
The app has been downloaded and installed by over 10K users and the latest update is dated Sep 25, 2016. There are adverts in Metal Detector LCD. The statistics reveal that this application is popular mostly among HTC and Sony users.
Get the .apk installer of Metal Detector LCD v1.5 that is free of charge and read users' reviews on Droid Informer. The file size is 3 MB and the app is developed for Android 3.0 and higher.