Originally Posted by
wphamilton
What I want is for the app to do everything without bothering me with it, and not drain my battery or take up much resources while doing it. What do you think, does that functionality already exist? Worth pursuing? Technical issues will sink the idea?
Yes, this exists. It has been developed by multiple startups. Most of them are marketing the technology to auto insurance companies for purposes of passively tracking driving. The techniques used to detect trip start/stop are varied. GPS is a battery hog. The best programs rely very little on GPS.