iGBA was a copycat version of developer Riley Testut's open-source GBA4iOS app, with the addition of ads on top. While it did not explicitly name GBA4iOS, Apple told us it removed iGBA from the App Store after learning that it was a knockoff app that copied another developer's work and attempted to pass it off as its own.

Notably, Apple confirmed to us that emulators on the App Store are permitted to load ROMs downloaded from the web, so long as the app is emulating retro console games only. Apple also said it had approved iGBA's functionality, before learning that it was a knockoff app, suggesting that Game Boy emulation is permitted on the App Store, but the company has yet to share any other examples of retro game consoles.

All in all, it appears that iGBA was removed from the App Store entirely because it was a ripoff of GBA4iOS, rather than due to piracy concerns resulting from users being able to load any ROM downloaded from the web. However, exactly which consoles Apple considers to be retro, and if there will be any other restrictions, remains to be seen.