# RST 599 Pro vs MTP Code Groups

The clearest difference is price: MTP Code Groups at Free against RST 599 Pro's $4.99. RST 599 Pro's advantage is iOS requirement (12.0 vs 15.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

MTP Code Groups is free to download; RST 599 Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RST 599 Pro ships an update every 2 months, MTP Code Groups every 6 weeks. The most recent releases landed on October 6, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | RST 599 Pro | MTP Code Groups |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.0 (3 ratings)](https://appshunter.io/ios/app/rst-599-pro/id1497452984/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 6 weeks** |
| Monetization | Paid | — |
| Size | 40 MB | 49 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [Oliver Bross](https://appshunter.io/developer/1859081127) |

## What reviewers say

### RST 599 Pro

[App page](https://appshunter.io/ios/app/rst-599-pro/id1497452984)

This application simulates amateur radio CW QSOs with realistic call signs, signal levels, and speeds. It supports various QSO styles, pile-ups, and includes features like RIT, CW filters, and a spectrum scope for an immersive experience.

**Highlights:** Realistic CW QSO simulation, Pile-up reproduction (up to 5 stations), Multiple QSO style support, RIT and CW filter functions, Spectrum scope display, Customizable call sign and CW speed

**Features:** macOS Compatibility

**In-app purchases:** none


### MTP Code Groups

[App page](https://appshunter.io/ios/app/mtp-code-groups/id6758036053)

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

**In-app purchases:** none


## Frequently asked questions

### Is RST 599 Pro free?

RST 599 Pro costs $4.99, with no in-app purchases.

### Is MTP Code Groups free?

MTP Code Groups is free to download, with no in-app purchases.

### Do RST 599 Pro or MTP Code Groups have ads?

Neither RST 599 Pro nor MTP Code Groups shows ads.

### Which is updated more often, RST 599 Pro or MTP Code Groups?

RST 599 Pro ships an update every 2 months, and MTP Code Groups every 6 weeks. Most recently, RST 599 Pro was updated on October 6, 2026 and MTP Code Groups on September 26, 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.*