Delta

Riley Testut

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, and N64.

FEATURES

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
• Supports PS4, PS5, Xbox One S, Xbox Series X, and MFi game controllers.
• Supports bluetooth (and wired) keyboards, as well as the Apple Smart Keyboard.
• Completely customize button mappings on a per-system, per-controller basis.
• Map buttons to special “Quick Save”, “Quick Load,” and “Fast Forward” actions.

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).

Cheats
• 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 (ex: 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.

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

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

Information

Version	1.5
Last updated	03/11/2024
Tags	Original

1.5
NEW
Local Multiplayer (thanks Ian Clawson!)
* Play multiplayer NES, SNES, and N64 games with friends
* Supports up to 4 players

AirPlay Support
* Stream your games to the big screen with AirPlay
* [DS] Layout screens horizontally or vertically on TV
* [DS] Optionally AirPlay just top screen for true multi-screen experience

Error Log
* Added detailed logging to help debug issues, especially related to syncing
* View complete error log by pressing “Export Error Log” in Settings

IMPROVED

Delta Sync
* Automatically resolves Cheat + ControllerSkin sync conflicts
* Syncs `GameSave.sha1` hash between devices to prevent redundant uploads
* Displays activity indicator when signing in
* Delays seeding Delta Sync database until initial sync
* Delays sync until after interactive Settings dismissal has completed
* Uses local modification date when uploading changes
* De-authenticates existing service when switching services
* [Dropbox] Improved error message when remote storage is out of free space

Non-MFi Controller Support
* New default mappings for single Joy-Cons and Switch NES/SNES controllers
* Uses Logo/Home button as Delta pause button if controller has one

Settings
* Revised UI to use modern “inset grouped” style
* Uses large titles where appropriate

Misc.
* Adds “Learn More” links to FAQ thoughout the app
* Replaces `UIDocumentBrowserViewController` with `UIDocumentPickerViewController` on iOS 17+
* Skips checksum verification when importing zipped games
* Displays “Touch Screen” instead of “iPhone” or “iPad” when using touch controls

FIXED

Delta Sync
* Fixed “Harmony.sqlite couldn’t be opened” sync error when there are more than 1000 games
* Fixed “file does not exist” sync error after restoring previous version
* Fixed Delta Sync switch remaining OFF if users cancels “Disable Syncing?” warning alert
* Fixed incorrect mass conflicts when signing out then back in
* Fixed missing references to remote files when signing out then back in
* Fixed queued syncs sometimes fetching outdated changes
* Fixed accidentally using wrong account when signed-in to multiple services
* Fixed issue causing Delta to skip seeding syncing database, potentially overwriting local data with old remote data
* Fixed incorrectly marking some game saves as conflicted during initial sync
* Fixed accidentally signing-out after signing-in to previous Google Drive account
* Fixed accidentally deleting Games directory during sync in rare circumstances

1.5_rc2
• Fixed issue where Delta could accidentally overwrite local data with old remote data
• Fixed incorrectly marking some game saves as conflicted during initial sync
• Fixed accidentally signing-out after signing-in to previous Google Drive account

1.5b2
NEW
AirPlay Support
• Stream your games to the big screen with AirPlay
• [DS] Optionally AirPlay just top screen for true multi-screen experience
Experimental Features
• New section in Settings for features by third-party contributors
• Features are WIP and should be used at user’s discretion
Initial Experimental Features
• Show Status Bar: View time/WiFi/battery while playing a game (@LitRitt)
• Game Screenshots: Take screenshots from pause menu (@LitRitt)
• In-Game Notifications: Show pop-up alerts when performing certain actions (@LitRitt)
• AirPlay Skins: Customize appearance of games on TV when AirPlaying
• Variable Fast Forward: Change the Fast Forward speed per-system
FIXED
• Fixed translucent controller skins resetting opacity after rotating device
• Fixed incorrect thumbstick size after rotating device

1.5b1
• Local Multiplayer (thanks Ian Clawson @ThatClawsonBoy!)
• Play NES, SNES, N64, and Genesis games with friends
• Supports up to 4 players\n\nImproved Non-MFi Controller Support
• New default mappings for single Joy-Cons and Switch NES/SNES controllers
• Uses Logo/Home button as Delta pause button if possible

1.4b4
NEW
• Fixed app freezing when using Hold Button feature
• Fixed re-activating held inputs

PREVIOUS BETAS
• Supports Split View and Stage Manager multitasking on iPad
• Optimized full screen-width controller skins when using Split View, Slide Over, or Stage Manager
• Fixed using Xbox controller analog sticks as D-pad inputs
• Fixed remapping analog sticks”,

1.4b2
NEW
– Supports Split View and Stage Manager multitasking on iPad
– Automatically pauses + resumes emulation when switching between foreground apps with Stage Manager
– Optimized full screen-width controller skins when using Split View, Slide Over, or Stage Manager
– Supports controller skins with new ‘placement’ parameter
– Supports controller skins with custom screens that don’t have explicit ‘outputFrame’

FIXED
– Fixed not detecting keyboard presses when remapping inputs
– Fixed potential crash rendering game screen after changing EAGLContext
– Fixed incorrect game screen frame when software keyboard appears on iOS 16
– Fixed software keyboard sometimes appearing when not emulating anything