The Delta game emulator is the first game emulator that isavailable for free on the App Store for the first time. It'll enable iOS users to enjoy the gaming experience on their iPhones almost like a pseudo Nintendo DS or GBA.

The app can be accessed onthe App Store in several countries outside the EU, and in the EU, it ismaking debut with the newly launched third-party AltStore PAL app marketplace. According to Riley Testut, developer of the Deltaemulator, both the app versions work the same. Other Nintendo emulators, including a wide range from the original Nintendo Entertainment System and Nintendo 64, are also expected to arrive to the App Store. 

On-screen buttons in the app change their layout andappearance to match the emulated system. Users can also put up extra buttonsfor different functions such as quick save states and fast-forward, as well as customizetheir layout.

The Delta app supports Bluetooth controllers like Xbox OneSeries S or PS5 controllers; and multiplayer for the NES, SNES, N64, and AirPlaystreaming too. It also works with some of Nintendo’s non-typical input methods,like the gyroscope and microphone controls.

Delta offers some additional touches as well, like automaticgrabbing of the box art for the games and the ability to customize the artusing its built-in database or even custom images. Users can also importcontroller skins and customize them.

Delta was first released as a 1.0 version in 2019, which meansthat it has been updated and improved multiple times through the years. This willlikely make the app one of the most enhanced emulation experiences on theiPhone.