# Modulin vs MIDI FX

The clearest difference is rating: MIDI FX at 5.0 against Modulin's 4.3. MIDI FX also leads on monetization model (free vs free with in-app purchases). Modulin's advantage is ratings volume (17 vs 4) and iOS requirement (10.0 vs 14.7). On price, update cadence, ads and in-app purchases there is nothing between them.

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

MIDI FX holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 17 and 4 respectively.

Modulin ships an update every 5 days, MIDI FX every 9 days. The most recent releases landed on October 2, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Modulin | MIDI FX |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.3 (17 ratings)](https://appshunter.io/ios/app/modulin/id1355652754/reviews) | **[5.0 (4 ratings)](https://appshunter.io/ios/app/midi-fx/id1641511918/reviews)** |
| Number of ratings | **17** | 4 |
| Positive reviews | 69.2% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 5 days** | Every 9 days |
| Monetization | Free with in-app purchases | **Free** |
| Size | 29 MB | 263 MB |
| Requires iOS | **10.0** | 14.7 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Grant Emerson](https://appshunter.io/developer/1399718785) | [Jorge Arroyo](https://appshunter.io/developer/548989572) |

## 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 |


### MIDI FX

[App page](https://appshunter.io/ios/app/midi-fx/id1641511918)

This app allows you to control and process MIDI signals for music creation. It offers features like harmonization, transposition, and sequencing, enabling you to control external or virtual synthesizers and create complex musical arrangements.

**Highlights:** MIDI signal processing, Harmonize and Transpose, Sequencer for synths, Delay and Looper, Filter notes by velocity, Internal instruments

**Features:** Family Sharing

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock app | $9.99 | one-time |


## Frequently asked questions

### Is Modulin free?

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

### Is MIDI FX free?

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

### Which has better reviews, Modulin or MIDI FX?

MIDI FX is rated higher. Modulin averages 4.3 out of 5 from 17 ratings, while MIDI FX averages 5.0 from 4 ratings.

### Do Modulin or MIDI FX have ads?

Neither Modulin nor MIDI FX shows ads.

### Which is updated more often, Modulin or MIDI FX?

Modulin ships an update every 5 days, and MIDI FX every 9 days. Most recently, Modulin was updated on October 2, 2026 and MIDI FX on October 6, 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.*