Saved me a headache I work in the oil field and was in a bind at midnight of course and needed a gauss meter to check the magnetism of some equipment. Praise Jesus King of glory! This app works better than the little hockey puck meters my company uses. Granted what I'm using it for simple z axis magnetics. But it saved my rear end.
This little app is nothing short of amazing. It truly works. If you don't believe me, give it a spin for yourself. I measured the electromagnetic field of my computer and other electronic devices in my house and then took it outside to measure the EM field of a high voltage power line close by. The closer you get to an EM field, the higher the reading. I was amazed at how much EM radiation my desktop computer emits when I place the phone within an inch of it. Parts of my house give out higher readings than the high voltage power pole outside. What an eye opener.
Compass is dangerously inaccurate The compass reads diffently to the internal one. DO NOT USE FOR NAVIGATION. Makes me think how the other readings are possibly way off too. Since it gets info from the internal compass something is really wrong. And yes my phone is good quality. Galaxy Note edge 4.
Excellent app... Just be careful around big magnets! App works amazingly well for sensing weak magnetic fields, but my Galaxy s4 doesn't seem to have much of a tolerance for strong fields. I was trying to see how strong some subwoofer motors (the magnet part) I have are, but I couldn't measure anything higher than about 33 gauss/3.4 millitesla (or, about a foot away) before my screen would turn off. EDIT: Also, this thing is awesome for demagnetizing tools! Drill shavings don't stick to my calipers anymore! This is amazing.
Update look but otherwise awesome on Note 5 Awesome app. It just needs a better look. Like different colored Magnetic measure. I like the volt tester look, just looks like its one from the 80s, dull orange does it no justice. Lol
Seems to have the best options for calibration and the MOST number of Menu Features. How well the Hardware works is one question, IF this APP works perfectly (seems OK) then this APP gives more to fiddle with than the others. It remains to be seen if I can get a REPEATABLE result, currently the orientation seems to have more to do with the Display than anything; could be detecting the Earth's Magnetic Field for all I know (and thus it is too sensitive to find a wire or magnet).