# CW Decoder

> Morse Code Decoder

Canonical page: [https://chrome-stats.com/d/id6748900681](https://chrome-stats.com/d/id6748900681)

## Overview

- **ID:** `id6748900681`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Keiya Chiba
- **Category:** Entertainment
- **Version:** 3.36
- **Last updated:** 2026-09-16
- **First published:** 2025-08-15
- **Size:** 12 MB
- **Data as of:** 2026-09-21
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/cw-decoder/id6748900681)
- **Privacy policy:** [https://www.jh1lhv.tokyo/morse\_decode](https://www.jh1lhv.tokyo/morse_decode)

## Description

AI greatly improved the decoding rate!
Core Morse decoding is free with no time limits.
[Premium]
- Continuous decoding: 3-min sessions (restartable)
- Font settings

High-Precision Morse Code Decoder（AI greatly improved the decoding rate!）

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.

## Rankings

- #2,250,590 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6748900681)