Amazon Appstore Preview is a feature that allows you to preview and download apps from the Amazon Appstore before they are officially released. This feature is available on both iOS and Android devices, and it allows you to try out new apps without having to wait for them to be released.

To use Amazon Appstore Preview, follow these steps:

1. Open the Amazon Appstore app on your device.
2. Look for the "Preview" button in the top-right corner of the screen.
3. Tap the "Preview" button to access the Amazon Appstore Preview section.
4. Browse through the apps available in the preview section and select the one you want to preview.
5. Once you have selected an app, tap on it to start the preview process.
6. The app will start downloading and installing on your device. You can continue using the app while it's being installed.
7. Once the app is fully installed, you can return to the main Amazon Appstore page and continue browsing or downloading other apps.

Note: Some apps may not be available for preview due to their nature or the terms of their release.