I see you have interest in downloading the history-zone TV app so that you will start by downloading the app called downloader on your android (Google or Fire TV device). Next you want to put the code "3017741" and if that doesnt work try "history-zone.github.io/app/tvdownload.apk" in the home/browser tab of the downloader app. but before that you will need to go to settings and see where it says my device click on my Fire TV like six times for enters development mode, then put install unknown sources from the downloader app and then you go back to the last step and then you have the app and then you can learn with history zone.