Applinked is a website / application in which you in your own right can add links to a database where you can then access them through an android application specifically developed for the purpose of easily browsing your applications in your store and installing them quickly in just a couple of steps.
(APK at the bottom of the page)
1. From the Main Menu scroll to hover over Settings.
2. Click My Fire TV.
3. Choose Developer Options.
4. Click Apps from Unknown Sources.
5. Choose Turn On.
6. Go to About — Network and confirm your IP Addresss
Install the APK from the link below