Is there a good "all-in-one" emulator for Android?
I used to use iOS, and there was a great emulator called "Delta". It was open source and free, and it was so easy to add games to it's library. Is there such an app for Android? I would very much like it if the app was open source and free.
Just to underscore this, Anbernic makes handheld gaming devices that run Retroarch and other emulators, and some like the rg353v come with Android and Linux dual booted.
Play Store won't let me download it saying its for an older version of android. Would you happen to have a recommendation for the second best place to download it?
Retroarch is your best option, but the learning curve can be very steep for some. There are great tutorials on the web about it. At the same time, if you have any questions, feel free to ask.
iOS sucks for retro gaming. Possible but tedious (In general, i am an iOS person, but gaming made me consider android.)
android emulation is more versatile snd allows for tweaking, which is required for many hardware/game/emulation mixtures
--Retroarch works best up to 16 bit systems
--N64 and up works best with dedicated emulators (mupen64 plus FZ, Dolphin, duckstation, aethersx2)