Install the Downloader App on your device if you haven’t already.
1. Go to Settings
2. Select “My FireTV”
3. Click Developer options
if you do not see developer options the link below will show you how to enable Developer Options
How to Enable Developer Options
4. Click Install unknown apps
5. Find the Downloader app and click it.
If you don’t see the Downloader app on this screen that means you need to install it from the Amazon App Store.
6. This will turn Unknown Sources to On for the Downloader app. You will now be able to sideload apps on your device!
7. Return to the Home Screen
8. Launch the “Downloader” application
9. In the “Enter a URL or Search Term:” field, enter the APK URL to download the APP (provided when you purchase a subscription) then click “Go”
10. Once the APP is downloaded Install the APP
11. Launch the APP once it is installed
12. Enter in your personal login credentials (provided when you purchase a subscription)