Compass+ HD is the most complete compass!!
4 in 1 for all your devices!! (not recommended for ipod)
-Compass
-Altimeter
-Speedometer
-Location
*Two compass type
*Two units for altimeter (meter - foot)
*Four units for speed (m/s - km/h - ft/s - mph)
*Open maps in your location
Ps. Switch on GPS for location, altimeter, speed, geographic north