# RST Decoder vs Head Copy

The clearest difference is rating: RST Decoder at 5.0 against Head Copy's 3.5. RST Decoder also leads on review sentiment (67% vs 25%) and in-app purchases (none vs 2). Head Copy's advantage is ads (none vs shown) and update cadence (weekly vs every 2 months). On price, ratings volume, device support and iOS requirement there is nothing between them.

Both are free to download. Head Copy sells 2 in-app purchases, starting at $3.99 per month. RST Decoder asks for nothing beyond the download.

RST Decoder holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 7 and 13 respectively. Written reviews point the same way: 67% of RST Decoder's written reviews are positive against 25% of Head Copy's.

RST Decoder ships an update every 2 months, Head Copy weekly. The most recent releases landed on September 8, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | RST Decoder | Head Copy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (7 ratings)](https://appshunter.io/ios/app/rst-decoder/id1519587362/reviews)** | [3.5 (13 ratings)](https://appshunter.io/ios/app/head-copy/id6751758685/reviews) |
| Number of ratings | 7 | **13** |
| Positive reviews | **66.7% of reviews** | 25.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 6 MB | 8 MB |
| Requires iOS | 17.0 | **16.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [CCE3D LLC](https://appshunter.io/developer/1553009036) |

## What reviewers say

### RST Decoder

[App page](https://appshunter.io/ios/app/rst-decoder/id1519587362)

This application decodes Morse code from your microphone, acting as a practice tool to verify your keying accuracy. It offers advanced features like BPF and FFT decoders with automatic frequency and gain control, allowing for fine-tuning of reception parameters.

**Highlights:** Microphone Morse code decoding, Morse practice and keying check, BPF and FFT decoder options, Auto Frequency Detector (AFD), Auto Gain Control (AGC), Real-time CW signal display, Input signal recording/playback

**In-app purchases:** none


### Head Copy

[App page](https://appshunter.io/ios/app/head-copy/id6751758685)

Master Morse code with realistic QSO simulations and professional training modes. Practice with authentic callsigns, radio conditions, and contest simulations. Ideal for amateur radio operators looking to improve their CW skills.

**Highlights:** Realistic QSO simulator with real callsigns, Professional training modes (POTA, SKCC, Contest), Authentic radio experience with QSB, QRN, and vintage effects, Adjustable WPM speeds (5-50 WPM), CarPlay integration for practice on the go, Background learning with sleep timer

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Head Copy Premium Monthly | $3.99 | per month |
| Head Copy Premium Yearly | $39.99 | per year |


## Frequently asked questions

### Is RST Decoder free?

RST Decoder is free to download, with no in-app purchases.

### Is Head Copy free?

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

### Which has better reviews, RST Decoder or Head Copy?

RST Decoder is rated higher. RST Decoder averages 5.0 out of 5 from 7 ratings, while Head Copy averages 3.5 from 13 ratings.

### Do RST Decoder or Head Copy have ads?

RST Decoder shows ads; Head Copy does not.

### Which is updated more often, RST Decoder or Head Copy?

RST Decoder ships an update every 2 months, and Head Copy weekly. Most recently, RST Decoder was updated on September 8, 2026 and Head Copy on September 11, 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.*