# CW Trainer vs RST Decoder Pro

The clearest difference is price: CW Trainer at Free against RST Decoder Pro's $1.99. CW Trainer also leads on ratings volume (4 vs 1) and device support (3 vs 1). RST Decoder Pro's advantage is rating (5.0 vs 1.8) and in-app purchases (none vs 2). On review sentiment, ads and monetization model there is nothing between them.

CW Trainer is free to download; RST Decoder Pro costs $1.99 up front. CW Trainer sells 2 in-app purchases, starting at $3.99 per month. RST Decoder Pro asks for nothing beyond the download.

RST Decoder Pro holds the better App Store score, 5.0 against 1.8. Both are backed by a comparable volume of ratings — 4 and 1 respectively. Written reviews point the same way: 44% of CW Trainer's written reviews are positive against 50% of RST Decoder Pro's.

CW Trainer ships an update every 3 months, RST Decoder Pro monthly. The most recent releases landed on September 27, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | CW Trainer | RST Decoder Pro |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | [1.8 (4 ratings)](https://appshunter.io/ios/app/cw-trainer/id1132950396/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rst-decoder-pro/id1521025545/reviews)** |
| Number of ratings | **4** | 1 |
| Positive reviews | 44.4% of reviews | **50.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Paid | Paid |
| Size | 78 MB | 1 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [md](https://appshunter.io/developer/502360039) | [koji kamogawa](https://appshunter.io/developer/1488210713) |

## What reviewers say

### CW Trainer

[App page](https://appshunter.io/ios/app/cw-trainer/id1132950396)

Learn Morse code using the effective Koch method. This app introduces letters at full speed, adding new ones as proficiency increases, to build and improve your Morse code skills.

**Highlights:** Morse code learning, Koch method implementation, Proficiency-based learning, Skill improvement

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| DX Pass — Monthly | $3.99 | per month |
| CW Trainer — Full Unlock | $4.99 | one-time |


### RST Decoder Pro

[App page](https://appshunter.io/ios/app/rst-decoder-pro/id1521025545)

This application decodes Morse code from your device's microphone, offering two decoding methods (BPF and FFT) with adjustable parameters. It includes features like automatic frequency detection, gain control, and real-time signal display for accurate Morse code practice and reception.

**Highlights:** Microphone Morse code decoding, BPF and FFT decoding methods, Auto Frequency Detector (AFD), Auto Gain Control (AGC), Real-time CW signal display, Waterfall display (Pro version), Adjustable control parameters

**In-app purchases:** none


## Frequently asked questions

### Is CW Trainer free?

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

### Is RST Decoder Pro free?

RST Decoder Pro costs $1.99, with no in-app purchases.

### Which has better reviews, CW Trainer or RST Decoder Pro?

RST Decoder Pro is rated higher. CW Trainer averages 1.8 out of 5 from 4 ratings, while RST Decoder Pro averages 5.0 from 1 ratings.

### Do CW Trainer or RST Decoder Pro have ads?

Neither CW Trainer nor RST Decoder Pro shows ads.

### Which is updated more often, CW Trainer or RST Decoder Pro?

CW Trainer ships an update every 3 months, and RST Decoder Pro monthly. Most recently, CW Trainer was updated on September 27, 2026 and RST Decoder Pro 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.*