Delta
| Delta_logo.jpg | |
| Developer(s) | Riley Testut and Shane Gill |
|---|---|
| Latest version | 1.7.3s [+] |
| Active | Yes |
| Platform(s) | iOS |
| Emulates | GBA GB/GBC NES SNES N64 DS |
| Accuracy | ? |
| Website | deltaemulator.com |
| Support ($) | Patreon |
| Programmed in | Swift |
| License | AGPLv3 |
| Source code | GitHub |
Delta is an multi-system emulator for iOS that currently supports NES (Nestopia), SNES (Snes9x), N64 (Mupen64Plus), GBC (Gambatte), GBA (VisualBoyAdvance-M), and DS (melonDS) emulation. Sega Genesis (Genesis Plus GX) support is in beta. [1]
Download
 
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App Store or AltStore PAL (EU) |
Overview
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 off its own core, however it is not libretro-based and uses its own system to link into these cores. RetroAchievement support is in a beta phase for select cores (NES, SNES, N64), and all cores are planned in the future.
Supported systems
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 (1.8) with initial support added in a beta release (1.3b4). See here
Issues
In the European Union, sideloading is the only way to use Delta.[2]
People have had issues with ROM hacks where some refuse to boot, and others run improperly.
Delta's RetroAchievements support is problematic due to paywalling the feature, which led to the decision to delist Delta and disable hardcore support on 12 September 2025.