# Modulin vs RRS Ivoks

The clearest difference is update cadence: Modulin at every 5 days against RRS Ivoks's fortnightly. On price, rating, review sentiment and ratings volume there is nothing between them.

Both are free to download. Modulin sells 1 one-off in-app purchase and RRS Ivoks sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.3 for Modulin against 4.4 for RRS Ivoks. Both are backed by a comparable volume of ratings — 18 and 46 respectively. Written reviews are what separate them: 69% of Modulin's written reviews are positive against 63% of RRS Ivoks's.

Modulin ships an update every 5 days, RRS Ivoks fortnightly. Both last shipped on October 24, 2026.

## The numbers

| Metric | Modulin | RRS Ivoks |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (18 ratings)](https://appshunter.io/ios/app/modulin/id1355652754/reviews) | **[4.4 (46 ratings)](https://appshunter.io/ios/app/rrs-ivoks/id6443504248/reviews)** |
| Number of ratings | 18 | **46** |
| Positive reviews | **69.2% of reviews** | 63.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 29 MB | 19 MB |
| Requires iOS | 10.0 | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Grant Emerson](https://appshunter.io/developer/1399718785) | [RRS, OOO](https://appshunter.io/developer/1486125568) |

## What reviewers say

### Modulin

[App page](https://appshunter.io/ios/app/modulin/id1355652754)

This app is a highly customizable analog modeling synthesizer designed for personal expression. It offers a wide range of visual feedback, sound modulation options, and built-in effects. Users can create, record, and share their musical creations.

**Highlights:** Customizable analog modeling synthesizer, LFO with four wave types, Low-pass filter and glide effect, Built-in reverb, delay, and chorus, Multi-track recording and playback, Synthesis exploration area, MIDI CC mapping

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Philharmodulin | Free | one-time |


### RRS Ivoks

[App page](https://appshunter.io/ios/app/rrs-ivoks/id6443504248)

This app emulates analog synthesizers, offering a range of sound shaping tools including oscillators, filters, and amplifiers. It supports AUv3 hosting for integration with music production apps and provides extensive MIDI control.

**Highlights:** Analog Emulation, AUv3 Compatible, Dual Oscillators, Filter Block with ADSR, Amplifier Block with ADSR, Modulation (LFO) Controls, MIDI CC Implementation

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RRS Ivoks Unlimited | $8.99 | one-time |


## Frequently asked questions

### Is Modulin free?

Modulin is free to download, with in-app purchases available.

### Is RRS Ivoks free?

RRS Ivoks is free to download, with in-app purchases available.

### Which has better reviews, Modulin or RRS Ivoks?

RRS Ivoks is rated higher. Modulin averages 4.3 out of 5 from 18 ratings, while RRS Ivoks averages 4.4 from 46 ratings.

### Do Modulin or RRS Ivoks have ads?

Neither Modulin nor RRS Ivoks shows ads.

### Which is updated more often, Modulin or RRS Ivoks?

Modulin ships an update every 5 days, and RRS Ivoks fortnightly. Most recently, Modulin was updated on October 24, 2026 and RRS Ivoks on October 24, 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.*