Most people stop using iPhone applications downloaded from Apple’s App Store after the first day according to analytics firm Pinch Media. The firm discovered only about 20% of people who download a free application from the store were still using it the following day. Paid apps had a slightly better return rate, with nearly 30% of people still using the download. Since the AppStore launched, Pinch Media has been providing developers with analytics that monitor app usage. The company provides information such