|Developer(s)||Riley Testut and Caroline Moore|
|Latest version||1.3.1 (2021/12/02)|
|AltStore -Installation Guide|
Delta is the successor to a popular GBA emulator, GBA4iOS, made by the same developer and started development back in March of 2015. Similar to RetroArch, it uses a core based approach with each system running of its own core, however it is not the same as the Libretro format. So far, only the NES, SNES, N64, GB(C), GBA and NDS systems are supported. Support for Sega Genesis emulation is planned for public release with initial support added in a beta release (1.3b4).
Due to Apple's unique philosophy on what is allowed to be on the App Store and limiting the ability to install third-party applications, installing the app can be a little bit complicated. Luckily there are multiple ways of installing and you can even do it without needing to jailbreak your phone, such as the developer's App Store alternative, AltStore.
Most of the systems have great compatibility, with the exceptions of DS emulation. Both DS cores are slow and have low compatibility, and can sometimes crash, but turning off low power mode can help. All systems also can have sound problems, ranging from crackling to latency of a few seconds.