Metal Detector for iPhone

This app makes your iPhone into a metal detector. Powerful and easy to use too.

Features:
-Looks simple and clean.
-Showing the metal detector with a gauge needle and the numbers together.
-Alerted by the sound when it detects metal.
-Calibrate the screen will pop up automatically when the device needs to be calibrate.
-You can turn off audio alerts as well as adjust the volume.
-While the app is running, you can set the screen all the time to use it more convenient.