Hi. I am Android delevoper and last time I've made my new application. This app is Compass - Travel Essential. Application uses sensors in smarthphones to measure azimuth. It may be useful in terrain 
Now, application is simple, but I will develop app in the future, so every opinion are welcome
I hope that new update will appear in the next few days.
Link to Google Play, here is also more information about application: https://play.google.com/store/apps/details?id=org.eszpila.simplecompass

Now, application is simple, but I will develop app in the future, so every opinion are welcome
I hope that new update will appear in the next few days.Link to Google Play, here is also more information about application: https://play.google.com/store/apps/details?id=org.eszpila.simplecompass