CoronaSDR vs Simple Morse Code Keyboard
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CoronaSDR
This application allows users to connect to and control RTL-SDR servers on their local network. It provides live spectrum and waterfall displays, various demodulation modes, and DSP controls for audio filtering and signal tuning. Users can save favorite stations and adjust RF settings.
- Live spectrum and waterfall display
- Multiple demodulation modes (AM, NFM, WFM, USB, LSB, CW)
- DSP controls (squelch, AGC, filters)
- Station favorites with import/export
- RF controls (PPM, tuner options)
- Diagnostics and performance pipeline
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CoronaSDR is an iOS app for listening to rtl_tcp SDR servers over your local network. Key features: - Live spectrum and waterfall rendering - Demodulation modes: AM, NFM, WFM, USB, LSB, CW - DSP controls: squelch, AGC, audio filters, de-emphasis - Station favorites with import/export - RF controls such as PPM and tuner options (hardware/server dependent) - Diagnostics and a performance-focused pipeline No account is required. Set your rtl_tcp host and port, connect, and tune. Built by Silviu YO6SAY for the radio community.
Simple Morse Code Keyboard
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Type in Morse Code — anywhere on iOS. A full system Morse Code Keyboard that replaces your standard one with a real CW keyer. Send a text, write an email, or post to social — all in dits and dahs. Built for ham radio operators who want authentic CW feel on mobile, and for learners who pick up the code fastest by using it every day. Keying Styles • Straight Key • Single Paddle • Iambic Paddle • Adjustable WPM Supported Morse Code Alphabets • ITU International • Spanish • Russian • Ukrainian • Bulgarian • Greek • Hebrew • Arabic • Persian • Kurdish • Japanese Wabun (Kana code) Designed for iOS • System-wide Morse Code Keyboard — works in every app • Portrait and landscape layouts • Low-latency input tuned for high WPM • Fully configurable Morse Code Keyboard For experts: the responsiveness and timing controls you need to send clean code at speed. For beginners: the best Morse Code trainer is daily use. Replace your keyboard, build muscle memory, and learn Morse code without "studying" it. Download the Morse Code Keyboard today and put a key in your pocket. 73!
Screenshots
Verdict
The clearest difference is price: CoronaSDR at Free against Simple Morse Code Keyboard's $4.99. Simple Morse Code Keyboard's advantage is update cadence (weekly vs every 3 weeks) and iOS requirement (16.0 vs 18.0). 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
CoronaSDR is free to download; Simple Morse Code Keyboard costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.
CoronaSDR ships an update every 3 weeks, Simple Morse Code Keyboard weekly. The most recent releases landed on September 5, 2026 and September 14, 2026 respectively.
| Parameter | CoronaSDR | Simple Morse Code Keyboard |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 5.0 (5 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 5 — better | — |
| Update frequency | Every 3 weeks | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 18.0 | 16.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 49 MB |
| Age rating | 4+ | 4+ |
| Developer | Alien Systems S.R.L. | BioRust Studios |
In-app purchases
CoronaSDR
No in-app purchases
Simple Morse Code Keyboard
No in-app purchases





