You can instantly download games and mobile apps to your Android device.
Customers located in these supported regions can order free apps without a payment method, as long as they have a valid billing address from a supported region in their default 1-Click settings. To set up your 1-Click payment method, go to About 1-Click Ordering
To purchase and install an app:
To access the new app from your Android device, open the Amazon Appstore for Android app on your device, open the menu, and then tap My Apps. Your apps appear under the Cloud tab. If your app isn't listed, tap Refresh to refresh your list. If you haven't received your order confirmation e-mail, check your order history and update your payment method, if necessary.