# S vs Coil

The clearest difference is rating: Coil at 5.0 against S's 2.6. Coil also leads on update cadence (every 8 days vs every 7 months) and price ($0.99 vs $2.99). S's advantage is ratings volume (11 vs 3). On ads, in-app purchases, monetization model and device support there is nothing between them.

S costs $2.99 and Coil $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Coil holds the better App Store score, 5.0 against 2.6. Both are backed by a comparable volume of ratings — 11 and 3 respectively.

S ships an update every 7 months, Coil every 8 days. The most recent releases landed on November 3, 2026 and November 2, 2026 respectively.

## The numbers

| Metric | S | Coil |
| --- | --- | --- |
| Price | $2.99 | **$0.99** |
| Rating | [2.6 (11 ratings)](https://appshunter.io/ios/app/s-modular/id1291071549/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/coil-spring-reverb/id6801904963/reviews)** |
| Number of ratings | **11** | 3 |
| Positive reviews | 31.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 8 days** |
| Monetization | Paid | Paid |
| Size | 7 MB | 75 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Paul Betowski](https://appshunter.io/developer/538476580) | [Joshua Rideout](https://appshunter.io/developer/1862462443) |

## What reviewers say

### S

[App page](https://appshunter.io/ios/app/s-modular/id1291071549)

This semi-modular synthesizer app for iPad offers a hands-on sound design experience with a single-screen interface for intuitive patching. It delivers a warm, vintage sound inspired by 1970s synthesizers, featuring dual oscillators, resonant filters, and multiple modulation sources.

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

**Features:** Vision Pro support

**In-app purchases:** none


### Coil

[App page](https://appshunter.io/ios/app/coil-spring-reverb/id6801904963)

This app simulates the sound and behavior of a spring reverb unit, offering two distinct tanks and engines for varied sonic textures. It allows for interactive "kicking" of the springs via tap or MIDI input, with adjustable decay, tone, and mix controls.

**Highlights:** Two distinct spring reverb tanks (Long/Short), Two reverb engines (physical modeling/vintage), Interactive "kick" feature via tap or MIDI, Adjustable Dwell, Tone, and Mix controls, Optional built-in amp stage, AUv3 and standalone app support

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is S free?

S costs $2.99, with no in-app purchases.

### Is Coil free?

Coil costs $0.99, with no in-app purchases.

### Which has better reviews, S or Coil?

Coil is rated higher. S averages 2.6 out of 5 from 11 ratings, while Coil averages 5.0 from 3 ratings.

### Do S or Coil have ads?

Neither S nor Coil shows ads.

### Which is updated more often, S or Coil?

S ships an update every 7 months, and Coil every 8 days. Most recently, S was updated on November 3, 2026 and Coil on November 2, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*