For Firestick:
While on the main screen of the firestick go to settings. Then to My Fire TV. Then to Developer Options. Make sure both options are turned ON.
Next you will want to go to the search in the upper left of the homescreen. Type in Downloader. Once found please install. Once installed open Downloader. In the address bar type in https://apk.musclehosting.net. This will download the file. Once finished install the app. Next, name the service.....then username, then password. Then login.
From there simply login with your credentials.
You can also use downloader and type in https://apk.musclehosting.net
For Android Boxes:
Since there are many versions of android boxes these instructions are general. Make sure Allow Unknown Sources are allowed in settings. Then open an emulator such as google chrome. In the address bar type in https://apk.musclehosting.net and download. From here you can follow the steps above.
Use these settings!!!