Rocket What program do I use for your program?

Help for Rocket IPTV Server.
Hello, I can see the differences in the various versions (FAQ: Which Kodi Add-ons do I need for NFPS, Rocket and 66 IPTV) but my question was more about if I can use/pick any of those options regardless of who's donation site I buy from or for example if I buy a Rocket donation, can I only use their service with one particular option?

Also, why would you want to install an emulator instead of just installing Kodi on an Android box?
 
You can use any of the options regardless of which donation site you buy from.

The emulators were designed specifically for iptv whereas Kodi wasn't. Not everyone wants to learn how to use Kodi as they just want to watch live tv. The emulators are as close to what they are probably used to as regards the channel list being similar to a cable STB. You have access to the older VODs on the emulator which are no longer available through the Kodi Stalker Video Addon.