Want to preview a mobile app on your Amazon Kindle Fire or other Android device before you install the software? Thousands of programs in the Amazon Appstore for Android include a Test Drive feature that lets you fire up a version the app in your browser window to try before you buy.

If you see a green Test Drive Now button on an app’s page, click it to pop open a window running an emulated version of the program that you can test for about 30 minutes. The app runs on the Amazon Elastic Compute Cloud (one of Amazon’s tools for developers) and not on your device or computer during the test drive. You can also see the whole Test Drive collection here.