SimpleCW: Morse Decoder

Morse & Digital Mode Chat

Free · In‑App Purchases

A single receiver for CW and digital modes, with automatic CW tuning, a live keying trace, and optional on-device ML decoding. Read Morse and digital-mode signals from audio with SimpleCW (formerly HamChat). Tune one receiver, watch the waterfall, and follow decoded text in the transcript. CW includes automatic tone acquisition or manual tuning, Otsu and Bayesian decoders, a live keying trace, speed estimates, and input-level feedback. An optional on-device ML CW decoder is included with Premium Modes Unlock on iOS 18 or later and macOS 15 or later. Decoder results depend on signal quality and sending style; Otsu is the default. Receive CW, PSK31/63, MFSK, Olivia, and RTTY. Classical receive in every mode and CW transmit remain free. A three-minute trial lets you try other transmit modes. The existing one-time Premium Modes Unlock purchase adds unlimited digital-mode transmit and the optional ML CW decoder. Use the microphone or a compatible audio interface. On Mac, System Audio can receive audio from other software with the appropriate system permission. Audio processing stays on the device. Copy or share the resulting transcript.

Ratings & Reviews

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HamChat is now SimpleCW: Morse Decoder. Existing users keep their app and premium unlock. A new single-receiver interface with a cyan waterfall, automatic or manual CW tuning, a live keying trace, input-level measurements, and copy confidence. Choose Otsu or Bayesian CW decoding, or use the on-device ML decoder with Premium Modes Unlock on supported devices. Existing unlock owners receive the added premium features. This update also fixes microphone sample-rate conversion, stale text after clearing or switching modes, the ML purchase sheet, and unsent-message handling when the transmit trial ends.

Version 0.6.0

The developer, Jeroen Rombouts, 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, for example, based 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

    Seller
    • Jeroen Rombouts
    Size
    • 14.5 MB
    Category
    • Utilities
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • iPad
      Requires iPadOS 17.0 or later.
    • Mac
      Requires macOS 15.0 or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Languages
    • English
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    • © Strange Loop Software
  • Privacy Policy

    • Supports

    • Family Sharing

      Some in-app purchases and subscriptions may be shareable with your family group when Family Sharing is enabled. Learn More

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