OpenTracks is a sport tracking application that completely respects your privacy.

Features:
* Sport tracking: track your sport and outdoor activities
* Photos and markers: mark interesting locations while tracking
* Altitude gain and loss: via barometric sensor
* Altitude shown in EGM2008 (above mean sea level); exported as WGS84
* Voice announcements
* Supports Bluetooth LE sensors: heart rate, speed and distance (cycling), cadence (cycling), and power meter (cycling)
* Export data: export tracks either as KMZ (incl. photos), KML,  or GPX
* No Internet access: Internet is not used