# S-Modular — Semi Modular Synth

> Semi-modular synthesizer app for iPad with vintage sound and intuitive patching. (iPhone/iPad app by Paul Betowski.)

- Source: https://appshunter.io/ios/app/s-modular/id1291071549 (this page in markdown: same URL + `.md`)
- Developer: [Paul Betowski](https://appshunter.io/developer/538476580)
- Category: Music, Entertainment
- Price: $2.99 (on sale, was $3.99)
- Rating: 2.60/5 from 11 App Store ratings · 16 written reviews indexed
- Age rating: 4+
- Requires: iOS 15.6 · 7 MB
- Languages: American English
- Released: 2017-10-16
- Data updated: 2026-08-23
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/s-modular/id1291071549/reviews.md

## What is S?

S-Modular is a semi-modular synthesiser for iPad, designed for fast, hands-on patching without clutter.

Everything is presented on a single screen, making sound design immediate and intuitive. Simply drag from one jack to another to create connections.

S-Modular delivers a distinctive vintage sound inspired by classic 1970s synthesis — warm, rich, and full of character.

Features

Dual oscillators

24 dB/oct ladder filter

Resonant high-pass and low-pass filters

Two LFOs

Four-step CV sequencer

Four-track mixer

Audio and CV splitter

Two AHR envelope generators

Delay effect

## Key features

- Single-screen interface
- Fast, hands-on patching
- Vintage 1970s synth sound
- Dual oscillators
- Resonant ladder filter
- Multiple modulation sources

## Recent user reviews (10 of 16)

All indexed reviews: https://appshunter.io/ios/app/s-modular/id1291071549/reviews.md

### 1/5 — Ridiculous w/o Zoom levels.

*2026-08-21*

As the title days. iPhone 12/17.6.2

### 3/5 — Sound nicht gut

*2023-04-10*

An sich sehr gut, macht spaß. Allerdings gibt es immer ein schnelles klacken zur Audio und die Soundqualität lässt auch noch zu wünschen übrig. Sonst aber super👍

### 2/5 — Listen to your users!!

*2022-11-23*

Basically same things people have been saying for years.....its in dire need of an update and not even gonna take the time to list everything this app needs to actually BE MORE than just a noise maker and simple 4 step sequencer, because everyone else has already stated all of that..... you really should listen to your users. 
Honestly would've requested a refund, but I'm stupid and had faith that the dev would actually read the reviews and take care of all that........2 stars til then
Oh and stop telling people to email you......because you apparently don’t respond or read those either lol

**Developer response:** The best way to contact me for feature requests is by email info@designbypaul.co.uk

### 4/5 — Great App

*2022-08-29*

Love It But Just Get MiRack Or VCV Rack Because There’s A Loooooooooooot More Functionality.

### 3/5 — Aller un effort

*2022-06-09, version 1.0.2*

Une entrèe midi serait top

### 1/5 — iPad 2 iOS 9.3.5.

*2021-11-28*

Não está funcionando no iPad 2, iOS 9.3.5. 
Será possível corrigir este erro?

### 1/5 — Nicht Kompatibel mit iOS 9.3.5!!!

*2021-11-23*

Die App lässt sich gar nicht starten und stürzt direkt wieder ab. Ich möchte mein Geld zurück!

### 1/5 — Abandoned

*2020-12-03*

Some potential, but completely abandoned. You can make a couple of interesting noises but that’s it. The dev should stop selling this or give it away.

**Developer response:** The best way to contact me for feature requests is by email info@designbypaul.co.uk I'm interested in what people want.

### 1/5 — No midi, what’s the point?

*2019-11-25*

No keyboard, no midi. Can’t control it.. what’s even the point?

### 5/5 — Coole App

*2019-06-13*

Coole App. Module sind aber beschränkt

## Frequently asked questions about S

### What devices does S-Modular support?

S-Modular is designed exclusively for iPad. It requires iOS 10.0 or later and is compatible with devices running iOS 10.0 or later.

### How much does S-Modular cost?

S-Modular is a paid application, available for a one-time purchase of $3.99. There are no in-app purchases or subscriptions.

### Does S-Modular have ads?

No, S-Modular does not contain advertisements. As a paid application, it offers an uninterrupted user experience.

### What is the age rating for S-Modular?

S-Modular has an age rating of 4+, making it suitable for a wide range of users interested in music creation.

### When was S-Modular last updated?

The latest version of S-Modular, 1.1.0, was last updated on March 25, 2026. This indicates a recent update, suggesting ongoing support.

### What kind of sound can I expect from S-Modular?

S-Modular delivers a distinctive vintage sound inspired by classic 1970s synthesizers, characterized by its warm, rich, and full-of-character audio output.

### How does patching work in S-Modular?

Patching in S-Modular is designed to be fast and intuitive. Users can create connections by simply dragging from one jack to another on the single-screen interface, avoiding clutter.

### What are the core synthesis components in S-Modular?

S-Modular includes dual oscillators, a 24 dB/oct ladder filter, resonant high-pass and low-pass filters, two LFOs, and two AHR envelope generators for sound shaping.

## Version history (last 5 releases)

### 1.2.0 — 2026-04-25

iPhone support 
Better file management

### 1.1.1 — 2026-03-30

GUI error Fix

### 1.1.0 — 2026-03-25

Resolved audio glitches caused by sample rate changes

### 1.0.2 — 2021-07-02

GUI fixes

### 1.0.1 — 2018-05-02

This app has been updated by Apple to display the Apple Watch app icon.

– Bug fix for audio routing through left channel only on some devices
– Minor GUI adjustments

## More apps by Paul Betowski

- [DUBSTEP / Loops / Keyboard / Drums](https://appshunter.io/ios/app/dubstep-loops-keyboard-drums/id557267838)
- [E Theremin – Electro Theremin](https://appshunter.io/ios/app/e-theremin-electro-theremin/id591471950)
- [SynthDrum Pads](https://appshunter.io/ios/app/synthdrum-pads/id657577819)
- [DNB / Loops / Synth](https://appshunter.io/ios/app/dnb-loops-synth/id670737604)
- [E–Theremin MKII](https://appshunter.io/ios/app/etheremin-mkii/id905407070)
- [WubSynth](https://appshunter.io/ios/app/wubsynth/id1074423582)

All apps by Paul Betowski: https://appshunter.io/developer/538476580

## Related topics

[model 15 modular synthesizer](https://appshunter.io/ios/topics/model-15-modular-synthesizer)

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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 2026-08-23.*