I installed Ignited via SideStore. No Jailbreaking necessary. Not computer tether. SideStore can renew the side loaded emulator every 7 days when on WiFi. The iPhone is perfect for DS emulation with a stylus.
(Ignited is a fork of Delta with more options, and SideStore is a fork of AltStore, with no computer tether needed)
Thanks! But wow does its UI make my screen look much smaller than it is.
If you're only interested in a few consoles you could try dedicated emulators.
If retroarch is too much you can try Lemuroid. Lemuroid is a much simpler emulation app with a more straightforward GUI. It doesn't come anywhere near the features or number of cores of retroarch but it supports most common retro systems.
Mypizzaboy is the best android emulator tbh
You can change scaling in options gear > user interface > appearance > menu scale factor
I don’t know how it works in RetroArch, with Delta/Ignited you can change the skin which also manages the size and position of the screens. I even designed custom skins to play full screen with no controls with Zelda since you don’t need the abxy and arrow buttons to play.