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)
The emulation itself is melonDS packaged into an iOS app. It also does GameBoy, GBA, NES, SNES, and N64 (which works astonishingly well, going through PaperMario64 too)
can melonDS actually look like that on android? I'll have to go check it out asap