# RDX vs SynthModule

The clearest difference is price: RDX at $3.99 against SynthModule's $29.99. SynthModule's advantage is update cadence (daily vs every 5 days) and iOS requirement (15.0 vs 17.0). On review sentiment, ads, in-app purchases and monetization model there is nothing between them.

RDX costs $3.99 and SynthModule $29.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RDX ships an update every 5 days, SynthModule daily. The most recent releases landed on October 17, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | RDX | SynthModule |
| --- | --- | --- |
| Price | **$3.99** | $29.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rdx-fm-manager-auv3/id6783084652/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 days | **Daily** |
| Monetization | Paid | Paid |
| Size | 1 MB | 94 MB |
| Requires iOS | 17.0 | **15.0** |
| Devices | iPhone, iPad, Mac | iPhone, iPad, iPod |
| Age rating | +4 | +4 |
| Developer | [Rubens Felicio](https://appshunter.io/developer/6775565794) | [isael lopes guimaraes](https://appshunter.io/developer/6784663435) |

## What reviewers say

### RDX

[App page](https://appshunter.io/ios/app/rdx-fm-manager-auv3/id6783084652)

This app acts as a librarian and player for classic 6-operator FM synthesizer patches (.syx files). It allows you to preview sounds, organize your collection, and export cartridges for hardware or software synths. It's designed for FM synthesis enthusiasts and DX7 owners.

**Highlights:** Real FM patch preview, Organize patch collections, Export .syx cartridges, Velocity-sensitive keyboard, Multiplatform support, AUv3 plugin included

**Features:** Vision Pro support

**In-app purchases:** none


### SynthModule

[App page](https://appshunter.io/ios/app/synthmodule/id6784663433)

This app provides a professional-grade keyboard and synthesizer experience on your iPhone or iPad. It offers a versatile mixer, extensive sound import capabilities, and advanced features for live performance and music production.

**Highlights:** SoundFonts with custom import, 8-channel mixer with FX, Live Set for instant scene recall, Drum Pad with sample playback, AUv3 plugin hosting, MIDI Learn with LED sync, Low-latency audio

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is RDX free?

RDX costs $3.99, with no in-app purchases.

### Is SynthModule free?

SynthModule costs $29.99, with no in-app purchases.

### Do RDX or SynthModule have ads?

Neither RDX nor SynthModule shows ads.

### Which is updated more often, RDX or SynthModule?

RDX ships an update every 5 days, and SynthModule daily. Most recently, RDX was updated on October 17, 2026 and SynthModule on October 8, 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.*