RetroX is a front end with all emulators included, but no ROMS. 5 day trial and then about 12usd to unlock it.Hi
Hi Mate where do you get the retro.gameimg.on the shield tia
PRG app is basically RetroX with all games included. 2 day trial and then £19.99 for lifetime.
Arcadepunks website or torrents have loads of Roms and then numerous separate emulators on Play Store or free setups like Retroarch, Hyperspin etc. You need to add your own ROMS etc
RetroX or PRG are very simple to use. The others require setting up, all depends on how much work you want to do.
Best thing is to YouTube it, but get then free trials of the other 2 at least.
I prefer RetroX as all the emulators are in 1 place, it's like Plex for Retro Gaming. Dead easy to add your own ROMS or PRG if you can't be bothered finding them.