Delta - Game Emulator 4+

All-in-One GBA4iOS Successor

Testut Tech

Designed for iPhone

    • Free

iPhone Screenshots


Delta is an all-in-one emulator for iOS. Delta builds upon the strengths of its predecessor, GBA4iOS, while expanding to include support for more game systems such as NES, SNES, N64, and DS.


Supported Game Systems
• Nintendo Entertainment System
• Super Nintendo Entertainment System
• Nintendo 64
• Game Boy (Color)
• Game Boy Advance
• Nintendo DS
• And plenty more to come!

Controller Support
• Nintendo Switch Pro controllers, Joy-Cons
• Nintendo Switch Online controllers (NES, SNES, N64)
• PS4, PS5
• Xbox One S, Xbox Series X
• MFi game controllers
• Bluetooth & wired keyboards

Save States
• Save and load save states for any game from the pause menu.
• Lock save states to prevent them from being accidentally overwritten.
• Automatically makes backup save states to ensure you never lose your progress.
• Support for “Quick Saves,” save states that can be quickly saved/loaded with a single button press (requires external controller).

• Supports various types of cheat codes for each supported system:
• NES: Game Genie
• SNES: Game Genie, Pro Action Replay
• N64: GameShark
• GBC: Game Genie, GameShark
• GBA: Action Replay, Code Breaker, GameShark
• DS: Action Replay

Delta Sync
• Sync your games, game saves, save states, cheats, controller skins, and controller mappings between devices.
• View version histories of everything you sync and optionally restore them to earlier versions.
• Supports both Google Drive and Dropbox.

Custom Controller Skins
• Beautiful built-in controller skins for all systems.
• Import controller skins made by others, or even make your own to share with the world!

Hold Button
• Choose buttons for Delta to hold down on your behalf, freeing up your thumbs to press other buttons instead.
• Perfect for games that typically require one button be held down constantly (e.g. run button in Mario games, or the A button in Mario Kart).

Fast Forward
• Speed through slower parts of games by running the game much faster than normal.
• Easily enable or disable from the pause menu, or optionally with a mapped button on an external controller.

3D/Haptic Touch
• Use 3D or Haptic Touch to “peek” at games, save states, and cheat codes.
• App icon shortcuts allow quick access to your most recently played games, or optionally customize the shortcuts to always include certain games.

Game Artwork
• Automatically displays appropriate box art for imported games.
• Change a game’s artwork to anything you want, or select from the built-in game artwork database.

• Gyroscope support (WarioWare: Twisted! only)
• Microphone support (DS only)
• Support for delta:// URL scheme to jump directly into a specific game.

**Delta is in no way affiliated with Nintendo. The name "Nintendo" and all associated game console names are registered trademarks of Nintendo Co., Ltd.**

What’s New

Version 1.5.4

Adobe threatened legal action unless we changed our app icon — so we did! Hope y'all like it :)

• New icon to avoid legal trouble
• Revised context menu for games
• Fixed exporting save file without file extension
• Fixed broken melonDS BIOS FAQ link

Ratings and Reviews

4.9 out of 5
20K Ratings

20K Ratings

osaym ,

Exceptional, best vintage emulator on the App Store!

It’s really cool to think how far we have came in terms of gaming in the last 20 years. 7 systems seamlessly on 1 device is just… amazing. This application brings so much joy to me, playing my childhood DS games. I ended up losing all of my childhood games on a flight when i was about 12 years old, and since then had been wanting to play the games again. I ended up loading all the games that I had lost into my library on the application 🥹 There are no bugs and the AirPlay integration is so cool, it just has a bit of an input delay.

One thing I wish was changed: when AirPlay is being used with a controller on DS games, the “lower-half” of the DS screen is not displayed, which is quite annoying. I think the expected behavior should be to have the “top-half” screen shared to the AirPlay device, while the “bottom-half” touch sensitive screen is present on the phone, so it is still able to be used.

Regardless, this app is the best thing to hit the app store and to hit the gaming industry in a really long time, and I’m excited to see how much further the developers can go with it in terms of devices and functionality. I will happily make a Patreon donation to promote the development of this application. :)

Someone567123 ,

Great emulator that just does its job right!

As a new iOS user, I'm glad that you can now use emulators officially without having to sideload, and I think that's awesome! There's not a whole ton of variety though, since at the moment, only Nintendo consoles all the way up to DS (excluding GameCube) are available to use. I was really hoping to be able to emulate Sega Genesis/Megadrive games right off the bat, but as I looked into it, it's still in beta development! I'd love to opt into the beta features, but I'm assuming that's a Patreon exclusive. I hope you guys can add more customization options too! Personally, controller skins are neat, but I'd love it if there was the ability to use filters and such, like an old CRT filter that blends in the pixels and smoothens things out a bit so that the dithering in certain games looks the way it was meant to be, like the Sonic 1 waterfall! Playing games in pixel-perfect integer scaling (so there isn't any weird pixel simmering on the screen) would be great for people who just like even pixels. As far as I know, there isn't a way to change the aspect ratio either. Some games look nicer when they're displayed in 4:3 instead of 8:7, which is the native resolution for both NES and SNES.

金大毛顺顺 ,

Exceptional Emulator with a Slick Interface – Delta!

//1. I've been using the Delta emulator on my device, and I must say, it's an absolute joy. The interface is clean and uncluttered, which makes navigating through settings and games an effortless experience. //2. There are no annoying ads to disrupt the gaming session, and the smooth operation enhances every aspect of gameplay. The convenience of the emulator is top-notch, thanks to its intuitive controls and compatibility with a wide range of game formats. It brings back all those nostalgic moments flawlessly, running classics without a hitch. //3. However, there's one feature that would make Delta even better — expanded cloud sync options. Currently, it supports Google Drive and Dropbox, which works well but integrating iCloud sync would be a game-changer for iOS users. This addition would streamline game data management across all Apple devices, making it much more accessible and secure. //4. In conclusion, Delta is a superb emulator that offers a premium nostalgic gaming experience. If iCloud support were added, it would undoubtedly be the perfect package. Highly recommended for anyone looking to relive their favorite gaming memories on the go!

App Privacy

The developer, Testut Tech, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Game Controllers

    Play this game with your favorite compatible controller.

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