Shimmy Diagnoser vs Morse Code Trainer, CW Decoder
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Shimmy Diagnoser
This app acts as a vibration meter for your vehicle, detecting and analyzing vibrations to identify potential issues. It provides real-time graphs and statistics to help diagnose problems with engines, tires, or propshafts, assisting both DIY enthusiasts and professionals.
- Vibration detection and analysis
- Real-time vibration graphing
- Identification of vibration sources (engine, tire, propshaft)
- Vehicle database integration
- Data storage and statistics
- Built-in RPM calculations
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Shimmy Diagnoser is a powerful app that replaces a conventional Vibration (NVH) meter, for use in your vehicle. It can detect even the slightest of vibration, and not only present the frequency in a graph, but also tell what part of your vehicle that has a problem. The perfect tool for the DIYer or for the professional workshop. Just enter your car’s information, drive in a speed that is causing the vibration and read the graph telling you the intensity. Easy to use app for determining why your car shakes, shimmy or vibrates! FEATURES: - Shimmy Diagnoser will show what type of vibration you are experiencing: Engine vibrations Tire vibrations Propshaft vibrations - Live plot of the vibrations in your car, in real time! - Analyzing and statistics of problematic vibrations - No need for a expensive bluetooth module, built-in rpm calculations - Large varied database of vehicles included - The ability to easily store the data of your car in a database A link to our website, containing the Help Book, tells you what your vibration is caused by - and how you can fix it
Morse Code Trainer, CW Decoder
Learn and practice Morse code with a comprehensive tool that translates text, sends signals, and decodes real-world audio. It offers structured lessons, progress tracking, and the ability to communicate directly with other devices. Unlock advanced features with a one-time purchase.
- Text to Morse code translation
- Morse code to text decoding
- Signal sending via sound, haptics, light
- Structured learning lessons
- Progress tracking and daily tests
- Audio/video/image signal analysis
- Direct device-to-device communication
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Morse code becomes far more useful when you can do more than look it up. MORSE gives you one clean workspace to translate a message, hear or send a signal, build real listening and keying skills, and keep the tools you need close at hand. Translate and send right away • Convert text to Morse code and Morse code back to text • Work with seven writing and code systems: International Morse, Chinese telegraph code, Japanese, Korean, Russian, Greek and Arabic • Send signals with sound, haptics, the flashlight or screen flashes • Choose playback speed and carrier tone, or start with ready-to-use common phrases Learn to hear it—not just read it • Follow 174 structured lessons across 29 units and six activity types • Build skills in Koch order through recognition, listening, comparison, sending, applied practice and challenges • Progress from characters and numbers to punctuation, prosigns, Q codes, callsigns and complete QSOs • Take a free 15-question daily test shaped by your current progress and previously learned weak points • Track accuracy, best scores, course progress and practice streaks • Pro unlocks the remaining 150 lessons, focused listening, Head Copy and weakness drills, plus full WPM, tone and Farnsworth controls Read real signals when you need to • See a provisional dot-dash and text preview while recording; after you stop, MORSE analyzes the full recording and produces a corrected result • Import audio, video or images containing Morse signals • Let MORSE analyze carrier tone and timing, with status and confidence feedback • Core media analysis runs on your device instead of sending signal content to a cloud recognition service Communicate, save and share • Enter dots and dashes with a Morse key and see the decoded text as you type • Exchange Morse messages directly with another nearby device; Pro adds optional 4-digit PIN content protection • Keep history and favorites, then reopen an item to continue editing • Export text and Morse signal cards for free; Pro adds WAV audio export • Import or export a local backup of your training progress Start free. Unlock Pro once. MORSE is free to download. Core text conversion is unlimited, and basic signal output, character references, daily tests, the first 24 lessons and nearby communication without a PIN are free to use. Microphone, audio, video and image recognition share one successful free experience. There are no ads, subscriptions or automatic renewals. MORSE PRO is a one-time non-consumable purchase that permanently unlocks Pro features. Your localized price is shown by the App Store, and previous purchases can be restored. New ways to practice Practice receiving Morse with keyboard answers and character-by-character feedback in Pro. Try straight-key input for free to work on the timing of dots and dashes.
Screenshots
Verdict
The clearest difference is price: Morse Code Trainer, CW Decoder at Free against Shimmy Diagnoser's $17.99. Morse Code Trainer, CW Decoder also leads on update cadence (fortnightly vs every 2 months). Shimmy Diagnoser's advantage is rating (3.5 vs 3.0) and in-app purchases (none vs 1). On ads and device support 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
Morse Code Trainer, CW Decoder is free to download; Shimmy Diagnoser costs $17.99 up front. Morse Code Trainer, CW Decoder sells 1 one-off in-app purchase. Shimmy Diagnoser asks for nothing beyond the download.
Shimmy Diagnoser holds the better App Store score, 3.5 against 3.0. That said, the two scores are not equally well evidenced: Shimmy Diagnoser has 8 ratings behind it against 1, so its average is the more settled of the two.
Shimmy Diagnoser ships an update every 2 months, Morse Code Trainer, CW Decoder fortnightly. Both last shipped on October 24, 2026.
| Parameter | Shimmy Diagnoser | Morse Code Trainer, CW Decoder |
|---|---|---|
| Price | $17.99 | Free — better |
| Rating | 3.5 (8 ratings) — better | 3.0 (1 ratings) |
| Positive reviews | 62.5% of reviews | — |
| Number of ratings | 8 — better | 1 |
| Update frequency | Every 2 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 3 MB | 25 MB |
| Age rating | 4+ | 4+ |
| Developer | DOAO Consulting AB | Vislab |
Customer experience
Shimmy Diagnoser
Morse Code Trainer, CW Decoder
In-app purchases
Shimmy Diagnoser
No in-app purchases
Morse Code Trainer, CW Decoder
- MORSE PRO One-Time Unlock$8.99
Questions
Is Shimmy Diagnoser free?
Is Morse Code Trainer, CW Decoder free?
Which has better reviews, Shimmy Diagnoser or Morse Code Trainer, CW Decoder?
Do Shimmy Diagnoser or Morse Code Trainer, CW Decoder have ads?
Which is updated more often, Shimmy Diagnoser or Morse Code Trainer, CW Decoder?
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