MorseKeyer vs KO3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MorseKeyer
This app simulates an electronic telegraph keyer with a dual-lever paddle for sending Morse code. It offers various keying modes, buffers paddle presses for higher speeds, and displays transmitted symbols, including international Morse code and extensions for multiple languages. It also recognizes and formats abbreviations used in amateur radio and other communications.
- Dual-lever paddle simulation
- Dot and dash memories
- Multiple keying modes (iambic, ultimatic, bug)
- Buffered paddle presses for speed
- Support for international Morse code and language extensions
- Recognition of CW abbreviations and prosigns
- Smart text formatting and dynamic alphabet switching
Read full descriptionHide full description
The app operates like a real electronic keyer with a dual-lever paddle, dot and dash memories and various keying modes including "iambic". It produces a series of short sound signals (dots) when one of the paddles is pressed and a series of long signals (dashes) when the other one is pressed. Letters, digits, procedural signals (prosigns) and other transmitted symbols are displayed on the screen. Additionally, Morse code abbreviations used in amateur radio, maritime, aviation and military communications are recognized and formatted appropriately. ADVANCED CW KEYER The keyer buffers paddle presses, that eases the manipulation and helps to transmit at higher speeds. High accuracy of generated signals contributes to high-quality transmission of Morse code. Keying modes: - Ultimatic — "last paddle wins" - Iambic (modes A and B) - Single lever - Semi-automatic, aka "bug" EXTENDED MORSE CODE When displaying the transmitted text, the app "knows" in addition to International Morse code a number of extensions for different languages. Supported alphabets include Japanese (Wabun code), Greek, Cyrillic-based and Latin-based alphabets with diacritical marks. The app recognizes details and nuances of Morse code for the following alphabets: Belarusian, Bosnian, Bulgarian, Croatian, Czech, Danish, Dutch, English, Esperanto, Estonian, Finnish, French, German, Greek, Hungarian, Icelandic, Italian, Japanese, Latvian, Lithuanian, Macedonian, Moldovan, Montenegrin, Norwegian, Polish, Portuguese, Romanian, Russian, Serbian, Slovak, Slovenian, Spanish, Swedish, Turkish, Ukrainian. SMART DISPLAY MorseKeyer does a lot to display the Morse code you transmit in the most readable form. For this purpose the app is equipped with the following functions: - Sophisticated text formatting - Dynamic switching between alphabets - Reasonable representation of errors These innovative features use multilevel content analysis to detect CW abbreviations, Q-codes, Z-codes, amateur radio callsigns and other special words. SOPHISTICATED TEXT FORMATTING The transmitted text can be displayed not only in the traditional all-capital format, but also using a kind of "smart" formatting. In this mode each word is displayed in the accepted form, as in the following CW session snippet: GM dr OM tnx fer call = ur RST is 599 = my QTH is nr London DYNAMIC SWITCHING BETWEEN ALPHABETS Even if you choose to use a non-Lating version of Morse code in your communication session, special words and Morse code abbreviations still can be displayed in Latin script. - In Wabun code the prosigns DO and SN as well as codes for Japanese parenthesis indicate switching between International and Japanese alphabets. MorseKeyer follows this convention and switches alphabets in such cases automatically. - A Cyrillic alphabet can be selected as the primary one to display most of the transmitted text, but all Morse code abbreviations and special words (CQ, de, ur, RST, my, QTH, name, tnx, etc.) as well as callsigns can still be represented in Latin script. REASONABLE REPRESENTATION OF ERRORS If you transmit a non-existent Morse code sign, the app displays it either as a dot-dash sequence or in another form depending on the current settings. In many cases MorseKeyer highlights a mistake, indicating its source and making it readable. ADVANCED SETTINGS MorseKeyer is ready to use out of the box. However, it has a lot of settings allowing you to fine tune it, customize and make more convenient in different use cases. NICE SOUND A special attention in the app is paid to the sound signal quality, its timbre, the optimal level of clicks and other characteristics, that make the sound of Morse code authentic and recognizable by any radio operator and comfortable to listen to.
KO3
This app provides a cyberpunk-themed interface for displaying real-time data, including health and weather. It's designed for use on iPads and VisionOS devices, offering authentic cyberpunk UI and widget support.
- Authentic Cyberpunk UI
- Real-time data readouts
- Health and weather data displays
- Widget support
- Compatible with VisionOS, iOS, iPadOS, macOS
Read full descriptionHide full description
KO3 Is The Only Cyberpunk App You Will Ever Need Prop Up A iPad, Or A Window In VisionOS For Constant Refreshing Data. Perfect For Any Cyberpunk Or Netrunner - Authentic Cyberpunk UI - Real Time Data Read Outs - Health And Weather Data Displays, And More - Widget Support - Compatible With VisionOS, IOS, IPadOS, And MacOS - Best If Used With Action Button
Screenshots
Verdict
The clearest difference is review sentiment: KO3 at 100% against MorseKeyer's 0%. KO3 also leads on price (Free vs $7.99) and update cadence (every 2 months vs every 42 months). MorseKeyer's advantage is chart position (#194 vs unranked) and iOS requirement (13.0 vs 26.0). On ads, in-app purchases 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
KO3 is free to download; MorseKeyer costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
MorseKeyer ships an update every 42 months, KO3 every 2 months. The most recent releases landed on August 26, 2026 and September 17, 2026 respectively.
| Parameter | MorseKeyer | KO3 |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 42 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Best chart rank | #194 — better | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 13.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 3 MB | 1 MB |
| Age rating | 4+ | 17+ |
| Developer | Yuri Wolf | Kenneth Schmidt |
Customer experience
MorseKeyer
KO3
In-app purchases
MorseKeyer
No in-app purchases
KO3
No in-app purchases









