Delta Emulator Setup Guide for iPhone

Delta is the emulator that made iPhone retro gaming worth it. It is free, it is on the App Store, and it covers nearly every classic Nintendo system in one clean app. NES, SNES, Game Boy, Game Boy Color, Game Boy Advance, Nintendo DS, and N64 all live under one roof. If you only install one emulator on your iPhone, make it this one.

This guide walks through installing Delta, loading games you own, adding a controller, syncing saves across devices, and customizing the look with skins.

Affiliate disclosure: This page contains affiliate links. As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.

What Delta Plays

Delta focuses on Nintendo systems and does them all well.

• NES and Famicom
• SNES and Super Famicom
• Game Boy and Game Boy Color
• Game Boy Advance
• Nintendo DS
• Nintendo 64

Performance is excellent across the board on any modern iPhone. For non-Nintendo systems, pair Delta with RetroArch using our iPhone emulation guide.

Step 1: Install Delta

Open the App Store, search for Delta, and install it. It is free. Because Apple now allows emulators, this is a normal download with normal updates. No jailbreak, no sideloading, no weekly resigning.

Step 2: Get Your Games Onto the iPhone

You supply game files from cartridges you own. There are a few easy ways to get them onto the phone.

1. Files app. Save your game files to iCloud Drive or On My iPhone, then import them in Delta.
2. AirDrop. Send files from a Mac straight to the Delta app.
3. Direct import. Use the plus button inside Delta to browse and add files.

Delta sorts games by system automatically once they are imported.

Step 3: Add DS BIOS Files if Needed

Most systems work with no extra files. Nintendo DS can ask for BIOS files for best compatibility, which you provide from your own hardware. Delta points you to the right import location. The other systems need nothing extra.

Step 4: Set Up Controls

Delta gives you touchscreen controls right away, and they are well laid out. For anything past Game Boy, a real controller is better.

• A clip-on grip like the
  Backbone One(affiliate link)
  adds real sticks and triggers and makes your iPhone feel like a handheld.
• A Bluetooth pad like the
  8BitDo controller(affiliate link)
  pairs in seconds when the phone is propped up.

Delta detects MFi and most Bluetooth controllers automatically. You can remap buttons in the app settings.

Step 5: Sync Saves Across Devices

One of Delta's best features is save sync. Connect Google Drive or Dropbox in the settings, and your save files and save states sync to the cloud. Start a game on your iPhone, pick it up on your iPad later. This also acts as a backup if you ever lose your phone.

Step 6: Customize With Skins

Delta supports custom skins that change the look and layout of the touch controls. You can make your SNES layout look like the real controller, or use a low-profile skin that keeps more of the screen visible. Browse community skins, import the file, and select it per system in settings. This is purely cosmetic but it makes the app feel like yours.

Tips for the Best Experience

• Turn on the fast-forward button for grinding through slow RPG sections.
• Use save states for tough spots, but keep in-game saves too for safety.
• Lower the screen brightness to stretch battery life on long sessions.
• For DS games with heavy stylus use, the touchscreen actually shines here.

What Delta Runs (and What It Does Not)

Delta covers the Nintendo family: NES, SNES, Nintendo 64, Game Boy, Game Boy Color, Game Boy Advance, and Nintendo DS. Genesis support is also in the app. Everything runs at full speed on any recent iPhone, and N64 titles run beautifully with a controller attached.

What Delta does not cover is everything else. PlayStation, PSP, Saturn, and arcade systems need RetroArch from the App Store, which is more powerful and much more fiddly. The practical setup for most people is Delta as the daily driver for Nintendo systems and RetroArch installed alongside it for PS1 and PSP. Sega-focused players should also look at the dedicated options in our iPhone emulation guide.

Frequently Asked Questions

Is Delta free?

Yes. Delta is free on the App Store with no ads inside the emulation experience. An optional Patreon supports development and unlocks cosmetic extras like alternate icons.

Why is my DS game slow or glitchy?

Import the DS BIOS files from your own hardware first, since some games misbehave without them. Then check that the phone is not in Low Power Mode, which throttles the chip enough to drag DS emulation below full speed.

Can I use Delta on iPad or Apple TV?

Delta runs on iPad with the same cloud save sync, which makes the phone-to-tablet handoff seamless. There is no Apple TV app, but AirPlay mirroring with a Bluetooth controller is a workable big-screen option.

Do cheats and fast forward work?

Both are built in. Cheats are added per game from the pause menu, and fast forward is a toggle you can pin to the touch overlay or map to a controller button.

The Bottom Line

Delta is the easiest win in iPhone emulation. Install it, import your Nintendo games, connect cloud sync, and pair a controller. For everything outside the Nintendo family, add RetroArch with our iPhone emulation guide. If you want a dedicated device instead of tying up your phone, see phone plus controller vs a dedicated handheld.