When it comes to Android apps, the sky is the limit. In addition to the standard Android Market, users can also install apps they have downloaded from anywhere. 

While I haven’t downloaded too many apps directly from websites, I have downloaded several apps through Amazon App Store, which offers a paid app for free every day. 

Originally touted as an alternative to Market (which at the time was driven by Google Checkout), Amazon App Store allows users to purchase apps much as they would through the Amazon Shopping app—i.e., by billing it to the credit card you had on file at Amazon. Now that the Market allows customers to charge their downloads to their phone carrier, this is less of an issue. 

Additionally, while the installation process may have changed since I initially downloaded the app, it struck me as non-intuitive and a little trickier than necessary (in that I seem to remember the download page originally being on a standard web page that had not been optimized for mobile devices—hopefully that has been changed). 

All the same, the opportunity to download apps that you would otherwise have to pay for makes Amazon App Store one of my must-have Android apps. 

What do you think? Pass or play on Amazon App Store?