CW Decoder

Morse Code Decoder

R59.99 · In-App Purchases · Designed for iPad

You can use the core feature—Morse code decoding—free of charge with no time limit. [Premium] Continuous decoding: 3-minute sessions (restart anytime). Font settings. High-Precision Morse Code Decoder Achieve noise-resistant, accurate Morse code decoding with high-precision, sample-level signal processing. Try the superior “listening performance” in the free version. Differences Between Free and Full Versions This app lets everyone try the high-performance decoding engine for free. Free Version - Continuous decoding: Up to 3 minutes per session (restart anytime, unlimited times) - Basic font display Ideal for testing performance and checking short communications. Full Version (Paid Add-on) - Unlimited time: For long ragchews and continuous monitoring - Font settings: Customize font type and size for better visibility Recommended for active operation and a stress-free learning experience. Main Features & Technology High-Precision Real-Time Decoding - Speed range: 5–50 WPM (auto-adjust speed and threshold) - Frequency detection: 400–900 Hz (automatically tracks the strongest signal) Advanced Signal Processing - Bandpass filter: Narrowband filtering reduces unwanted noise - AGC (Automatic Gain Control): Compensates for signal level changes and fading - Noise blanker: Reduces spike noise using MAD (Median Absolute Deviation) - Signal stabilization: Multi-sample buffering helps prevent false detections Designed for Real-World Use - Scrollable text: Review and check missed content - Frequency lock: Tracks the actual operating frequency range (400–900 Hz) - Visual support: On-screen text supports listening and copying Recommended For Morse Code Beginners Great for those getting started with Morse code. Seeing decoded text while listening helps self-correction and improves learning efficiency. Amateur Radio Operators - CW practice: Compare results with your own copying to find weak points - Contests: Helpful for high-speed reception support and log checking - Portable ops: No PC needed—build a CW reception setup with just a smartphone Comeback Hams & Experts Useful for reducing fatigue during long monitoring sessions and supporting operators with hearing decline. Powerful filtering helps decoding in weak-signal or interference conditions. Note: Microphone permission is used only for signal analysis. No audio is saved or transmitted.

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v3.11 - Improving decoding rates in production environments - Other minor bug fixes Morse Code Decoder is continuously updated and improved to enhance SNR (Signal-to-Noise Ratio).

Version 3.11

The developer, Keiya Chiba, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary based, for example, on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    • Provider
      • Keiya Chiba
    • Size
      • 805.9 KB
    • Category
      • Entertainment
    • Compatibility
      Requires iOS 17.2 or later.
      • iPhone
        Requires iOS 17.2 or later.
      • iPad
        Requires iPadOS 17.2 or later.
      • Mac
        Requires macOS 14.2 or later and a Mac with Apple M1 chip or later.
      • Apple Vision
        Requires visionOS 1.1 or later.
    • Languages
      • English and Japanese
    • Age Rating
      4+
    • In-App Purchases
      Yes
    • Copyright
      • © 2025 JH1LHV
  • Privacy Policy

    • More by Keiya Chiba

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