iPhone Navigation website found from the data published on the website of famous research organization ComScore that Apple's iPhone has began to make a move in the iPhone game market and posed a certain threat to Sony PSP and Nintendo DS. Investigations pointed out that 32% of the iPhone users had downloaded games. As the overall percentage of smart phone users who download games was only 3.8%, this downloading rate of iPhone games was really impressive. Moreover, the downloads by the iPhone gaming users accounted for 14% of the total mobile game downloads last year.