Benefits of the Amazon Appstore
Naturally Amazon want Android owners to use their apps marketplace rather than the official Android Market, and to do this they have made arrangements with the developers of the most popular Android apps to list their wares on the dedicated Amazon Appstore at www.amazon.com/mobile-apps.
Thousands of the best apps are listed here, and these can be purchased with one-click buying on Amazon. A mobile version of the Amazon Appstore can also be installed on devices, but the real killer is the presence of premium apps for free.
In addition to this, the service offers the Test Drive feature, through which you can run a virtualized version of the app on your PC to see how it works before purchasing.
Offering a free “app of the day" is a great idea by Amazon, kicking off with a new version of Angry Birds (Angry Birds Rio) and continuing daily.
The "App of the Day" feature has generated plenty of interest around the world. Sadly, however, the Amazon Appstore cannot currently be used outside of the United States; although international customers can download the appstore, purchases are blocked unless you have a US credit card and a US billing address.