Comparison

RST Decoder Pro vs iKickButts

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

RST Decoder Pro

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
Read full description

This is an App that decodes Morse code input from the microphone. I recommend that you try the basic functions and usage with the free version before purchasing. It is a Morse practice App that you can use to check if you are keying the correct code. Signals with good S/N can be decoded correctly, but signals with bad S/N cannot be decoded correctly. Also, the performance will be degraded for extremely slow or fast signals. Usually about 5 to 10 characters are required for speed synchronization of Morse Code. Adjust the input signal so that the peak value changes from level 6 to level 7. Make fine adjustments to each parameter according to the reception status. [Additional Functions] -In addition to the decoder using BPF, a new decoder using FFT has been added so that it can be switched according to the usage. -AFD (Auto Frequency Detector) function has been added to the decoder using BPF, and BPF can be set automatically by pressing the AFD button. -The decoder using FFT automatically follows the strongest signal in the band by AFD (Auto Frequency Detector) and AGC (Auto Gain Control). You can also hold the AFD / AGC parameters by pressing the Lock button. * There will be a time lag of about 1 to 2 seconds for AFD tracking. * The Pro version also supports waterfall display. [Control parameters] 1.Language select English and Japanese(KANA) 2.Audio Input Level 3.BPF ON/OFF 4.BPF of Center Frequency 5.BPF of Band Width 6.BPF of Shape 7.Notch ON/OFF 8.Notch of Center Frequency 9.CW Speed Control ON/OFF 10.CW Speed Control Low, Mid1, Mid2 or High 11.Delete All Decoded Text 12.Realtime CW Signal Display 13.Input signal recording function. 14.Playback function from the file list. 15.Support the Garbage Data reduction function [Note] Since the signal after BPF is output to the audio output, it can also be used as an AF-CW filter. [URL of this App(Free version) working example video] The GUI is slightly different, but the basic functionality is the same. https://youtu.be/Pwp7W4m-m34

About

iKickButts

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
Read full description

Use the iKickButts app to protect the environment from toxic single-use cigarette butts and other commercial tobacco product waste! Learn about the toxic legacy of commercial tobacco products in outdoor environments. iKickButts allows you to photograph, map, classify, and count tobacco (T), electronic cigarette (E), and cannabis (C) (TEC) waste. Share findings on social media, download data, create reports, and join community science projects! Whether you’re an individual, community group, organization, school class, government agency, or researcher, this app provides the tools you need to collect and share data about TEC waste to support efforts to protect the public from the toxic pollution of TEC waste. Key Features: • Learn & Educate: Access educational resources about the impact of TEC waste on public health and the environment. • Capture & Store: Photograph TEC waste items and store images in the app. • Map TEC Waste: View TEC waste on a map and filter by location, date, and type of waste. • Categorize and Count Waste: Tag, count and classify TEC waste images. • Share on Social Media: Raise awareness by sharing TEC waste images and descriptions with your community via social media. • Download Data: Export detailed TEC waste data in a CSV file for analysis and reporting. Files include geolocation, tags, date, and time. • Create Custom Reports: Generate summary reports based on location, time, waste type, and project-specific filters to share findings. • Organize Community Science Projects: Join an existing project and/or organize groups and create projects within the app to participate in community science projects related to TEC waste. • Advocate for Policy Change: Advocate for and participate in the democratic process to achieve policy change that supports efforts to protect public health and the environment from the toxic pollution of TEC waste. Download the iKickButts App today and take the first step toward cleaner, healthier communities!

Screenshots

RST Decoder Pro4 screens
iKickButts4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
RST Decoder Pro versus iKickButts: the parameters behind the verdict, then further details
ParameterRST Decoder ProiKickButts
Price$1.99Free — better
Rating5.0 (1 ratings) — better4.2 (5 ratings)
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings15 — better
Update frequencyMonthly — betterEvery 2 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS17.013.0 — better
Further details — not scored
Size1 MB158 MB
Age rating17+12+
Developerkoji kamogawaRadiant Creative Group, LLC

Customer experience

RST Decoder Pro

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

iKickButts

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

RST Decoder Pro

No in-app purchases

None

iKickButts

No in-app purchases

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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