Seems like this was just an (unlicensed) "fork", with the only addition being obtrusive ads.
The copyright situation here seems a bit confusing, though: At least for Delta, a multi-console emulator by the same author, there's a notice that the author "has no choice but to distribute Delta under the AGPLv3 license" (due to the emulator cores being licensed as that) [1].
The license note goes on to say "unless you plan to submit your app to Apple’s App Store, in which case written permission from me is explicitly required".
This sounds like an additional restriction incompatible with at least the GPL-sourced emulator cores included.
The copyright situation here seems a bit confusing, though: At least for Delta, a multi-console emulator by the same author, there's a notice that the author "has no choice but to distribute Delta under the AGPLv3 license" (due to the emulator cores being licensed as that) [1].
The license note goes on to say "unless you plan to submit your app to Apple’s App Store, in which case written permission from me is explicitly required".
This sounds like an additional restriction incompatible with at least the GPL-sourced emulator cores included.
[1] https://github.com/rileytestut/Delta