More than 20 million downloads in around two years: The iOS emulator Delta has become hugely popular among retro gaming fans. With version 2.0, released on October 22, the developers have now delivered their most extensive update yet. Several posts on Bluesky also highlight the new features. One particularly interesting addition is support for Apple’s new foldableiPhone Duo, which can effectively be transformed into a Nintendo DS.
The emulator uses the two halves of the display to recreate the classic dual-screen layout of DS games, automatically adjusting the virtual controls to different folding positions. Even closing the device works like it did on the original handheld: When the iPhone is folded shut, the game automatically enters sleep mode. As the embedded video below demonstrates, even the outer display takes on the appearance of a Nintendo DS when the phone is closed. The Apple Pencil can also be used as a stylus.
For regular iPhones and iPads: Sega classics, new achievements and Pokémon DLC
Delta 2.0 also has plenty to offer users of conventional iPhones and iPads. For the first time, the emulator supports Sega Genesis games, known as Mega Drive titles in Europe. Matching retro-style virtual controllers are included as well. Players looking to make things a little easier can also use classic cheat codes through Action Replay and Game Genie.
Another major addition is RetroAchievements integration. This allows players to unlock achievements in supported retro games, even though the original releases often had no achievement systems of their own. Pokémon fans also have something to look forward to. A new DLC feature is designed to bring additional content to classic Game Boy Advance games, including rare Pokémon and special event items. All mainline Pokémon games released for the Game Boy Advance are expected to be supported, with the first content additions scheduled to arrive soon.
ⓘ Delta
New Liquid Glass design
The update also brings a substantial visual overhaul. Delta now features a Liquid Glass design and a redesigned game library with dedicated sections for favorites and recently played titles. Animated controller skins are another new addition, with virtual buttons that actually move when pressed. New graphics filters, including a classic CRT effect, help recreate the atmosphere of retro gaming. Game Boy titles can also be displayed using different color palettes.
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Marius Müller, 2026-10-24 (Update: 2026-10-24)
