# RST 599 Pro vs MorseCAT

The clearest difference is price: MorseCAT at Free against RST 599 Pro's $4.99. MorseCAT also leads on update cadence (every 2 weeks vs every 2 months). RST 599 Pro's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.1). On ads and device support there is nothing between them.

MorseCAT is free to download; RST 599 Pro costs $4.99 up front. MorseCAT sells 1 one-off in-app purchase. RST 599 Pro asks for nothing beyond the download.

RST 599 Pro ships an update every 2 months, MorseCAT every 2 weeks. The most recent releases landed on September 27, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | RST 599 Pro | MorseCAT |
| --- | --- | --- |
| 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** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 40 MB | 37 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) | [Aspen Ventures, LLC](https://appshunter.io/developer/1479334231) |

## 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


### MorseCAT

[App page](https://appshunter.io/ios/app/morsecat-morse-code-trainer/id6793568945)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MorseCAT Pro | $4.99 | one-time |


## Frequently asked questions

### Is RST 599 Pro free?

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

### Is MorseCAT free?

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

### Do RST 599 Pro or MorseCAT have ads?

Neither RST 599 Pro nor MorseCAT shows ads.

### Which is updated more often, RST 599 Pro or MorseCAT?

RST 599 Pro ships an update every 2 months, and MorseCAT every 2 weeks. Most recently, RST 599 Pro was updated on September 27, 2026 and MorseCAT on September 18, 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.*