This is a gold and metal detector app for Android smartphones. This app can be used to find gold and other metals in different materials. It's a very simple and easy-to-use app. It uses the magnetic sensor of your smartphone to detect any metal. 

The app also has a graph showing the results of the scan. It can also be used to find the value of the gold in the material you are working with.

It has a built-in calibration function that can be used to test the sensor and get a better result. It can also be used to measure the magnetic field in nature.