This app uses the builtin three-axis magnetometer built into iPhones these days. I tried it on an iPhone 6 and 7. Choose your own typeface for the constantly updating displays- I'm not able to include my cool Eurostile commercial font.
I don't speak Russian. But, the UI is in Russian.
This is for experimentation only- do not use for space flight, drilling to the center of the Earth, or any other critical purposes! The author disclaims any warranty or liability for its use.