So here's a useful iPhone app for those wishing to be US citizens or even new US immigrants: the iUSA. The iUSA will give you the entire history of the US and its government right on your iPhone. In short, it's like a concise encyclopedia about the United States of America.

Of course, the iUSA is not only useful for immigrants and those soon to be taking their citizenship test but also for tourists as well. The iUSA will give you a concise history about each US state and the background of every US presidents. You won't need tour guides anymore as you can just look up historical information on your iPhone.

The iUSA is a paid application but there's a free version: the iAmerica which gives a history of the United States through its presidents. You can download the iUSA and iAmerica at Apple's App store.

Via: Cellphone-Reviews