This app does not work

As usual this kind of app does not work on ipad mini 2.
Any ipad i have had compass also works a few times and then is useless.
Living in the wild norwegian mt woods, has shown this fact consistently.
Any one else comes here with iphone, or ipod touch or ipad same thing happens if I use it.
So it may work in the city. But nature has all kinds of factors like granite piezo electricity, gravity anomalies, weird gamma radiation (cpm rates in the millions, but only for minutes, different to non "weird" gamma.
Bottom line.... Zero values show on app.
This app, does not work at all.

Sim1wwwwwww about Digital Altimeter FREE, v1.3.3