Pro Compass

Pro Compass replicates the look and feel of classic pocket compass hardware in use since the 1800s, adding modern features and technologies. The app uses advanced OpenGL graphics (normally reserved for games) to render 3D floating compass hardware for realistic operation.
Pro Compass offers nine different compass modes with direct read, traditional, and rosette styles capable of displaying degrees, quads, or mils (the direct read mode shows a North-South needle and reversed East-West convention). In all display modes, Pro Compass shows both magnetic and true direction simultaneously, with a rotating outer true ring that is automatically adjusted for local magnetic declination. Sun and Moon position are marked on the compass rings and continually updated.
Pro Compass displays location and altitude, with decimal, degree-minute-second, UTM, and MGRS position formats. An optional "Datum Pack" adds over 230 geodetic datums covering regions and countries on all continents around the world. The app also contains a built in two-axis inclinometer that drives two independent bubble levels and a bullseye level. The inclinometer has angle readout dials for each axis, making it useful for many different types of measurements including slopes, pitches, sight lines, and geological angles like dip and strike.
After using Pro Compass, you'll see why it's the best and most realistic compass available on the App Store! Also be sure to check out the new Pro Compass for Watch, available for all Apple Watch models running watchOS 6 or later.
***** IMPORTANT ACCURACY NOTE *****
Pro Compass reports accuracy directly from the magnetometer sensor in your device. This accuracy is determined by the hardware, not the application itself.
To improve results, operate Pro Compass away from any electronics or other sources of electro-magnetic interference, including car dashboards, aircraft cockpits, metal structures, and other devices.
Please contact the developer via the support link if you need additional information about accuracy or operation of Pro Compass.