Upon arriving to Poland, I was told by the local experts that mobile tracking was not going to work. In fact, it does work great, even at altitudes.

The pre-release version of GlideTrack for Android is available at http://glideport.aero/GlideTrack/index.html
(Will get the release version in the Play Store when I get back.)

More info about GlideTrack including the source code is at https://github.com/glideport/GlideTrack

Cheers. Pedja
http://tiptop.com/011

PS. You can also see the top 15m tracks after the flight at http://glideport.aero/wgc2014
(Click the left button on the bottom of the screen to go to the previous day.)