# Synthesizer

> Mobile synthesizer app for additive, subtractive, and FM sound synthesis. (iPhone/iPad app by Stefan Welebny.)

- Source: https://appshunter.io/ios/app/synthesizer/id292398741 (this page in markdown: same URL + `.md`)
- Developer: [Stefan Welebny](https://appshunter.io/developer/287589115)
- Category: Music, Education
- Price: $3.99 (on sale, was $11.99)
- Rating: 2.80/5 from 50 App Store ratings · 19 written reviews indexed
- Age rating: 4+
- Requires: iOS 18.2 · 2 MB
- Languages: American English
- Released: 2008-10-04
- Data updated: 2026-07-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/synthesizer/id292398741/reviews.md

## What is Synthesizer?

How are you going to sound today?

Turns your iPhone or iPad into a groovy synth based on additive, subtractive and fm sound synthesis. 

One of the first synthesizers ever built for the App Store, originally released with the very first iPhone back in 2008.

Features: 

5 main oscillators
frequency modulation
lfo
chorus
pitch shift
modulation wave forms (sin, triangle, sawtooth, rectangle)
attack, decay, sustain and release
noise
distortion
cutoff
delay
bitcrusher
presets
wave shape view

External MIDI Support:

The app automatically listens to any connected MIDI input. The app responds to notes, modulation wheel, and pitch bend in real time, while still letting you use the on-screen pad at the same time.

Screen recording for sharing your sounds with others.

Shake your device to return to factory settings for the current sound.

Accessible with VoiceOver and DirectTouch.

Keywords: synthesizer, accessible synth, sound synthesis, sound effects, harmonics, sound synthesis


WHAT USERS AROUND THE GLOBE SAY:

"This is an awesome Synthesizer"  

"really good! this app is really fun 2 use and entertaining"

## Key features

- Additive, subtractive, and FM synthesis
- 5 main oscillators
- Frequency modulation and LFO
- Chorus, pitch shift, and distortion effects
- External MIDI support
- VoiceOver and DirectTouch accessibility
- Screen recording for sound sharing

## Recent user reviews (10 of 19)

All indexed reviews: https://appshunter.io/ios/app/synthesizer/id292398741/reviews.md

### 5/5 — Love this

*2013-07-06*

Such a great app. Good for the analog synth fans. Don't bother if you're trying to write dance music or sequence nin style melodies but if you love effing around with Arps or apcs or pretending you own a theremin, you'll like it.

### 1/5 — Bob saget!

*2011-08-03*

Bad.... Bad bad bad

### 1/5 — Hate it!!!

*2010-12-31*

Worst app ever!!!

### 3/5 — Yes!thanks.......

*2010-05-29, version 0*

I really like the way this synth sounds - and we are using it for recordings. Exactly what I was looking for in a synth and I can have it on my phone. Deserves speeding up touch response, de crash & de bugging -  a really good little instrument . The fret board is a little bit small for average fingers. Just needs an update. 
Gmm246

### 2/5 — Worth the price

*2009-08-31, version 0*

But rather limited. I find myself getting bored with it. Not bad either way.

### 2/5 — Awkward & clunky

*2009-07-19*

Difficult to operate sliders, poor envelope control. An interesting idea that needs a LOT of work.

### 2/5 — ZIP! ZANG! TUMB!

*2009-04-09*

!

### 3/5 — Pretty sweet

*2009-03-21*

Pretty sick man put a keyboard on this and you could make some crazy stuff

### 1/5 — Touch me

*2009-02-14, version 0*

Why no ipod touch 1st gen support?

### 1/5 — Sad

*2009-02-14*

This is a waste of time. 
There are so many better music apps out there.

## Frequently asked questions about Synthesizer

### What synthesis methods does Synthesizer use?

Synthesizer utilizes additive, subtractive, and FM sound synthesis methods to create a wide range of sounds. This allows for diverse sonic exploration and sound design possibilities.

### Can I connect external MIDI devices to Synthesizer?

Yes, Synthesizer offers external MIDI support and automatically listens to any connected MIDI input. It responds to notes, modulation wheel, and pitch bend in real time while allowing simultaneous use of the on-screen pad.

### Is Synthesizer accessible for users with disabilities?

Synthesizer is accessible with VoiceOver and DirectTouch, ensuring a usable experience for a broader range of users. This commitment to accessibility makes it a more inclusive music creation tool.

### How often is Synthesizer updated?

The latest version of Synthesizer is 13.1, last updated on January 5, 2026. This indicates a recent update, suggesting ongoing development and support for the application.

### What is the price of Synthesizer?

Synthesizer is available for a one-time purchase of $11.99. This is a paid application, offering full access to its features without further in-app purchases or subscriptions.

### What devices is Synthesizer compatible with?

Synthesizer is designed for iPhone. While it is an iOS application, specific compatibility with iPad models may vary depending on the iOS version and device hardware.

### What is the age rating for Synthesizer?

Synthesizer has an age rating of 4+. This indicates that the content is generally suitable for all ages, with no mature themes or potentially disturbing material.

### How can I reset Synthesizer to factory settings?

You can reset Synthesizer to the factory settings for the current sound by shaking your device. This is a quick and convenient way to revert to default parameters if you wish to start fresh.

## Version history (last 5 releases)

### 13.1 — 2026-01-05

•	Fixed an issue where playback could be silent on Bluetooth headphones
	•	Better handling of switching between AirPods and the iPhone speaker while the synth is running
	•	Stability and reliability improvements

### 13 — 2025-11-29

Screen recording is here. Capture your play sessions, save your favorite sounds, and share your performance with the world.

### 12 — 2025-10-02

Now accessible for visually impaired users, supporting VoiceOver and DirectTouch.

### 11 — 2025-08-26

Support for more iOS versions and devices. External MIDI support.

### 3.6 — 2009-09-09

Pulse width modulation.

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## More apps by Stefan Welebny

- [HearLight](https://appshunter.io/ios/app/hearlight/id6746683316)
- [Lane Defender: Haptic Arcade](https://appshunter.io/ios/app/lane-defender-haptic-arcade/id6749909197)
- [Sound15](https://appshunter.io/ios/app/sound15/id6751850805)
- [Long Distance Call](https://appshunter.io/ios/app/long-distance-call/id6752960682)
- [OuvreToi](https://appshunter.io/ios/app/ouvretoi/id6753959125)

All apps by Stefan Welebny: https://appshunter.io/developer/287589115

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-04.*