To purchase an app from the Amazon Appstore through your device, first download the Amazon Appstore to your phone and set up your 1-Click payment settings

Tap the Amazon Apps icon to open the app. You'll immediately see the Free App of the Top Apps, as well as lists of New apps and apps by category. You can also find apps in the following ways:

Click the “Buy App” or “Get App” button to download an application. The application is added to the My Apps page within the Amazon Appstore app on your device, and automatically installed.