# RST Decoder Pro vs iKickButts

The clearest difference is review sentiment: iKickButts at 100% against RST Decoder Pro's 50%. iKickButts also leads on price (Free vs $1.99) and ratings volume (5 vs 1). RST Decoder Pro's advantage is rating (5.0 vs 4.2). On update cadence, ads and in-app purchases there is nothing between them.

iKickButts is free to download; RST Decoder Pro costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RST Decoder Pro holds the better App Store score, 5.0 against 4.2. That said, the two scores are not equally well evidenced: iKickButts has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 50% of RST Decoder Pro's written reviews are positive against 100% of iKickButts's, so the app with the better star average is not the one people write more warmly about.

RST Decoder Pro ships an update monthly, iKickButts every 2 months. The most recent releases landed on September 20, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | RST Decoder Pro | iKickButts |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rst-decoder-pro/id1521025545/reviews)** | [4.2 (5 ratings)](https://appshunter.io/ios/app/ikickbutts/id1664486901/reviews) |
| Number of ratings | 1 | **5** |
| Positive reviews | 50.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 2 months |
| Monetization | Paid | **Free** |
| Size | 1 MB | 158 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [koji kamogawa](https://appshunter.io/developer/1488210713) | [Radiant Creative Group, LLC](https://appshunter.io/developer/1021882711) |

## What reviewers say

### 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


### iKickButts

[App page](https://appshunter.io/ios/app/ikickbutts/id1664486901)

This app helps users identify, map, and classify cigarette butt and other tobacco product waste. It provides educational resources and tools to collect and share data, supporting environmental protection and policy change efforts.

**Highlights:** Photograph and map tobacco product waste, Classify and count waste types, Access educational resources on waste impact, Share findings on social media, Download data for analysis, Organize community science projects

**In-app purchases:** none


## Frequently asked questions

### Is RST Decoder Pro free?

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

### Is iKickButts free?

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

### Which has better reviews, RST Decoder Pro or iKickButts?

RST Decoder Pro is rated higher. RST Decoder Pro averages 5.0 out of 5 from 1 ratings, while iKickButts averages 4.2 from 5 ratings.

### Do RST Decoder Pro or iKickButts have ads?

Neither RST Decoder Pro nor iKickButts shows ads.

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

RST Decoder Pro ships an update monthly, and iKickButts every 2 months. Most recently, RST Decoder Pro was updated on September 20, 2026 and iKickButts on June 1, 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.*