The best synth apps for iOS turn an iPhone or iPad into a serious sound machine, from Moog’s faithful recreations to Korg’s classic emulations and forward-looking instruments like Animoog. Because most run as AUv3 plugins, you can play them standalone or load them inside a DAW. This guide explains what to look for and walks through the strongest iOS synths.
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Quick answer
- Lush, evolving pads and leads: Animoog (Moog).
- Deep modular analogue character: Moog Model 15.
- Classic semi-modular synthesis to learn on: Korg iMS-20.
- All-in-one creative groovebox synths: Korg Gadget instruments.
Note: these are iOS/iPadOS apps. Android does not have the same depth of synth apps, so if you are on Android see our iPhone vs Android for music production comparison first.
What to look for in an iOS synth app
- AUv3 support: This is the big one. AUv3 lets you run the synth inside a DAW or host with full automation and recall. See what AUv3 apps are.
- Synthesis type: Analogue-style subtractive, FM, wavetable and more each give different textures. Match the engine to the sounds you want.
- Playability: A good on-screen keyboard, plus MIDI input for a hardware keyboard. See the best MIDI keyboards for iPad.
- Presets vs sound design: Beginners want strong presets; sound designers want deep editing.
- Effects: Built-in reverb, delay and modulation make a synth usable on its own.
Understanding the main types of synthesis
Most iOS synths fall into one of a few engine families, and knowing the difference helps you pick the right app rather than buying on looks alone. Each engine has a sonic fingerprint, so it pays to start from the sound in your head and work backwards.
- Subtractive (analogue-style): Starts with a rich waveform such as a sawtooth or square wave and carves it down with filters. This is the classic warm, fat sound behind most basses, leads and analogue pads. Moog Model 15 and Korg iMS-20 are subtractive instruments.
- FM (frequency modulation): Uses one oscillator to modulate another, producing bright, bell-like, metallic and glassy tones that are hard to get from subtractive engines. FM is excellent for electric pianos, plucks and digital textures.
- Wavetable: Scans through a table of single-cycle waveforms, so the timbre can morph and evolve over time. Great for modern, moving leads and the kind of growling basses heard in electronic music.
- Granular and sample-based: Chops audio into tiny grains or plays back recordings, which suits atmospheric textures, evolving soundscapes and hybrid sounds. Animoog’s engine leans into this kind of movement.
You do not need to master the theory to make good sounds, but matching the engine to your goal saves a lot of preset-hunting. If you want gentle evolving beds, reach for a granular or wavetable instrument; if you want a punchy bassline, a subtractive synth will get you there faster.
The best synth apps for iOS
Animoog (Moog)
Animoog uses Moog’s anisotropic synth engine to produce wide, evolving, expressive sounds that are hard to get elsewhere. It is brilliant for pads, leads and movement, and its touch surface is genuinely expressive on an iPad. A great first “wow” synth.
Best for: iPhone and iPad players who want expressive, evolving pads and leads from the off. It also loads as an AUv3 plugin inside a host like AUM or GarageBand.
Moog Model 15
A faithful modular synth based on a classic Moog system. You patch modules together to build sounds from the ground up, which makes it deep and rewarding for anyone serious about analogue-style synthesis. It rewards patience and is best on an iPad.
Best for: iPad users who want to learn proper subtractive synthesis by patching from scratch. If you’d rather a fixed-architecture classic, Moog’s Minimoog Model D app is the simpler companion pick.
Korg iMS-20
An emulation of Korg’s classic MS-20 semi-modular synth, complete with a patch bay and sequencer. It is a fantastic way to learn hands-on synthesis with real patch cables, and it has a gritty, characterful sound.
Best for: iOS players who want a gritty, hands-on analogue character with a built-in sequencer. For broader sounds, KORG Module is the companion pick for sampled keys and pianos.
Korg Gadget instruments
Korg Gadget bundles a large collection of synths and drum machines (“gadgets”) in one app, many usable as AUv3 plugins. It is a strong all-in-one if you want lots of varied sounds and a built-in way to build tracks, and the included drum gadgets make it a credible rival to the dedicated best drum machine apps for phones. Great value for the breadth on offer.
Best for: iOS users who want one purchase to cover dozens of synths and drum machines plus a way to arrange tracks. The free KORG Gadget Le version lets you try the workflow first.
Other notable iOS synths
There is a deep catalogue beyond these, including wavetable and FM synths and granular instruments, most of which run as AUv3 plugins. Once you find an engine you like, you can host several together. For keyboard-style instruments specifically, see the best piano and keyboard apps.
Best for: a free starting point, try AudioKit Synth One — a fully free, no-strings synth that’s perfect for learning, and one of several standouts in our roundup of the best free music-making apps. Popular paid picks for richer, modern sounds include Sunrizer, Zeeon and Poison-202.
How to use synth apps together
The real power of iOS synths comes from running them inside a host. Load them into a DAW like Cubasis or GarageBand, or route several through AUM, so you can layer sounds and sequence them in one project. Our guides on using AUM to connect your music apps and using Cubasis show how to build that setup, and they slot neatly into a wider session if you are learning how to make music on an iPad.
How to choose
- Start with the sound you want. Pads and atmospheres point to Animoog; analogue depth points to Model 15; gritty classic tones point to iMS-20.
- Consider your level. Beginners benefit from strong presets; experienced users want deep editing.
- Check AUv3 support if you plan to use the synth inside a DAW.
- Use an iPad where possible for the extra screen and expressive control.
Common mistakes to avoid
A few habits trip up newcomers and make iOS synths feel more limited than they really are. Avoiding these will get you to usable sounds far quicker.
- Buying on looks instead of engine. A gorgeous interface means little if the synthesis type does not produce the tones you need. Decide on the sound first, then pick the engine, as covered above.
- Ignoring AUv3. If you ever plan to record into a DAW, a standalone-only app will leave you bouncing audio by hand. Favour AUv3 instruments so they sit in your project with full recall and automation.
- Hoarding presets and never editing. Presets are a starting point. Even small tweaks to the filter cutoff, envelope or effects turn a generic patch into something that fits your track.
- Overloading an older device. Several synths and effects running at once can stress an older iPhone or iPad. Raise the buffer size in your host, freeze or bounce finished parts, and close apps you are not using.
- Forgetting to manage power and storage. Big synth and sample libraries eat space, and long sessions drain the battery fast. Keep the device charged and clear old projects you no longer need.
Frequently asked questions
Are these synth apps available on Android?
Mostly no. The strongest synth apps, including Moog and Korg titles and most AUv3 instruments, are iOS/iPadOS only. Android has fewer comparable options, which is one reason iOS leads for mobile music.
Do I need a MIDI keyboard to use synth apps?
No, the on-screen keyboards work. But a MIDI keyboard makes playing far more natural and expressive. See the best MIDI keyboards for iPad.
Can I use iOS synths in a real song?
Absolutely. Hosted as AUv3 plugins in a DAW, they record, automate and mix like any instrument. Plenty of released music uses iOS synths.
Do I need an iPad, or is an iPhone enough?
An iPhone runs almost all of these synths perfectly well and is great for sketching ideas anywhere. An iPad simply gives you more screen for patching, on-screen playing and seeing a host’s mixer, which makes deeper synths like Model 15 and iMS-20 far more comfortable to use.
How much do iOS synth apps cost?
It varies widely. Several capable instruments such as AudioKit Synth One are completely free, while premium recreations from Moog and Korg are paid one-off purchases. A good approach is to start with a free synth to learn the basics, then invest in a paid instrument once you know which engine and sound you prefer.
