Think there was more than one company or developer with this concept but this company was active at first here replying back to people.
Looked like a interesting plan for a business circling around most likely gps information to datamine,but have not seen anything for quite some time.
Think what is most likely happening is they walked away from the project or have stalled for the time being.
But having if active on the app store must mean it is semi active enough,the guidelines for apps is a unknown for me though.

Bet you could search back and contact them directly here,just to lazy at the moment to look it up.