A free app for Android, by dzLab.

The magnetic sensor is one of the most useful tools for us. It is a very important sensor, because it can be used for a number of things. For example, for finding the location of a metal object, or for finding the position of a metal object relative to the earth. It can also be used to check the magnetic field strength, to check if there are any metal objects near you.

It is very important that you use the right tool for the job. If you are not sure what to use, then check this app, because it will tell you the right thing to use.