PC Engine Super CD-ROM² System / TurboGrafx-CD.Multiple Options for Managing ROMs, Game Saves and Cover Art.ROM Customizations (Cover Art, Game Titles) (Instructions).Automatic ROM Matching (Game Title, Cover Art, Description, Genre, etc…) via OpenVGDB.Cheatcode support! Currently for SNES and PSX only.Local Multiplayer via External Controllers.
Anything outside of this, you are on your own. You are legally allowed to make personal backup copies of your own purchased games for personal use as ROMs. You can download the Provenance app for iPhone and iPad from the links below.
Provenance emulator for iOS & tvOS is a multi-emulator frontend, supporting various Atari, Bandai, NEC, Nintendo, Sega, SNK and Sony console systems.