Magnetic field measurement in microteslas by magnetic sensor. Put on the screen and determine N-pole or S-pole of the magnet.
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I love the app! It helped me confirm my magnet tester. And both works great ^_^ it tells you which pole of the magnet you have while facing the screen :)
It actually works! No adds! Love it!
With Family Sharing set up, up to six family members can use this app.