High-Precision Morse Code Decoder

Achieves noise-resistant and accurate Morse code decoding through high-precision, sample-level signal processing.
Experience this superior "listening performance" first-hand with the free version.

This app allows everyone to try the high-performance decoding engine for free.

[Free Version]
- Continuous decoding limit: Up to 3 minutes per session (can be restarted unlimited times).
- Basic font display.
-> Ideal for testing app performance and checking short communications.

[Full Version (Paid Add-on)]
- Unlimited Time: Optimized for long ragchews and continuous monitoring (watch).
- Font Settings: Customize font type and size to improve visibility.
-> Recommended for active operation and a stress-free learning environment.

★ High-Precision Real-Time Decoding
- Speed Range: 5-50 WPM (Auto-adjustment of speed and threshold).
- Frequency Detection: 400Hz - 900Hz (Automatically tracks the strongest signal).

★ Advanced Signal Processing (The Difference is Here!)
- Bandpass Filter: Narrowband filter aggressively removes unwanted noise.
- AGC (Automatic Gain Control): Automatically compensates for signal strength fluctuations and tracks fading.
- Noise Blanker: Removes spike noise based on MAD (Median Absolute Deviation).
- Signal Stabilization: Multi-sample buffering to prevent false detections caused by noise.

- Scrollable Text: Allows you to scroll back and check missed content.
- Frequency Lock: Powerfully locks onto the actual operating frequency range (400Hz–900Hz).
- Visual Support: The visual display strongly supports auditory decoding.

★ Morse Code Beginners
Perfect for those who are interested in Morse code but don't know where to start. Visualizing the text while listening allows for self-correction, dramatically improving learning efficiency.

★ Amateur Radio Operators
- Efficient CW Practice: Compare decode results with your own copying to find weaknesses.
- Contesting: Use as a support tool for high-speed CW reception and log checking.
- Portable Operations: No bulky PC needed. Build a portable CW reception environment with just a smartphone.

★ Comeback Hams & Experts
Use as an assistive tool to compensate for hearing decline or to reduce fatigue during long monitoring sessions. Powerful filtering supports decoding even in weak signal or interference conditions.

Note: Microphone permission is used solely for signal analysis. No audio data is saved or transmitted. Please use with confidence.