Some years ago I started to try to develop an application for Symbian when Qt becames the predefined framework for Symbian^1. Not very successfull.
Then recently I tried Android with a native application falling into a Java hell with many time spent for a poor result. I don't really like Java because everythings seems to be as complicated as possible and Android adds an addictional layer of complication.
This way I've developed 2 applications for now: Pend Wars, a strategic game clone, and Racing1 Data, a collection of all data about Formula1 from 1950 to now.