Arcadia
Retro gaming emulator for iOS, built with Swift and based on the libretro API.
GitHub
Arcadia is a retro gaming emulator for iOS, based on the libretro API. It allows users to play classic games from various platforms on their iOS devices, while striving to be user friendly and visually appealing.
It uses a modular system to support multiple gaming platforms, effectively making implementing a new platform as simple as compiling the corresponding libretro core, implementing the protocol to interface with the core and adding the necessary assets (icons, etc).
The emulator has been on the App Store for a year, but has been now delisted due to financial reasons. The code is still available on GitHub and anyone is free to use it.