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)
it's been a few years since I've used an iPhone, mainly because of the third party apps thing. Don't these usually get shut down for violating Apple's enterprise license agreement or something?
This uses the legal 3 testing app you can load via Xcode which is an Apple app. SideStore simply facilitates that process.