# MorseKey vs RST Decoder

The clearest difference is rating: RST Decoder at 5.0 against MorseKey's 4.5. RST Decoder also leads on update cadence (every 2 months vs every 12 months). MorseKey's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, review sentiment, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RST Decoder holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 28 and 7 respectively. Written reviews split almost evenly too, at 67% and 67% positive.

MorseKey ships an update every 12 months, RST Decoder every 2 months. The most recent releases landed on September 18, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | MorseKey | RST Decoder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (28 ratings)](https://appshunter.io/ios/app/morsekey/id312260358/reviews) | **[5.0 (7 ratings)](https://appshunter.io/ios/app/rst-decoder/id1519587362/reviews)** |
| Number of ratings | **28** | 7 |
| Positive reviews | 66.7% of reviews | 66.7% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 12 months | **Every 2 months** |
| Monetization | **Free** | Ad-supported |
| Size | 0 MB | 6 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 17+ |
| Developer | [HotPaw Productions](https://appshunter.io/developer/285074853) | [koji kamogawa](https://appshunter.io/developer/1488210713) |

## What reviewers say

### MorseKey

[App page](https://appshunter.io/ios/app/morsekey/id312260358)

Practice sending Morse Code with this simple touchscreen keyer. Adjust tone frequency and volume, or use the iambic keyer for speed training. Ideal for learning and practicing Morse Code transmission.

**Highlights:** Touchscreen Morse code key, Adjustable tone frequency, Adjustable volume, Iambic keyer (mode A), Adjustable dot speed

**Features:** Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is MorseKey free?

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

### Is RST Decoder free?

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

### Which has better reviews, MorseKey or RST Decoder?

RST Decoder is rated higher. MorseKey averages 4.5 out of 5 from 28 ratings, while RST Decoder averages 5.0 from 7 ratings.

### Do MorseKey or RST Decoder have ads?

RST Decoder shows ads; MorseKey does not.

### Which is updated more often, MorseKey or RST Decoder?

MorseKey ships an update every 12 months, and RST Decoder every 2 months. Most recently, MorseKey was updated on September 18, 2026 and RST Decoder on September 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.*