# MorseDecoder — Translate Morse Code to Text

> Morse code sound decoder for iPhone and iPad with adjustable parameters. (iPhone/iPad app by HotPaw Productions.)

- Source: https://appshunter.io/ios/app/morsedecoder/id313071325 (this page in markdown: same URL + `.md`)
- Developer: [HotPaw Productions](https://appshunter.io/developer/285074853)
- Category: Utilities, Education
- Price: $9.99
- Rating: 3.20/5 from 49 App Store ratings · 104 written reviews indexed
- Age rating: 4+
- Requires: iOS 12.3 · 1 MB
- Languages: American English
- Released: 2009-04-25
- Data updated: 2026-09-06
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/morsedecoder/id313071325/reviews.md

## What is MorseDecoder?

The HotPaw Morse Code Decoder translates Morse Code sound into text.  Just use the microphone or headset input on your iPhone or iPad for the audio signal input, and watch decoded text appear.

The Morse Code Decoder includes both an automatic decoding mode, plus manual controls to allow the decoding of weaker signals in noise and QRM.  Manually adjustable parameters include the frequency of the audio filter, the WPM dot/dash speed used for detecting characters, the threshold level of background noise, and whether Farnsworth timing is to be used for detecting spaces between individual characters.

The Morse Code Decoder includes a built-in spectrogram to help determine the audio frequency of the Morse Code tones.  Use the optional narrow-band DSP audio filter to help filter out background noise.  The audio filter works for tone frequencies from 300 to 2400 Hz.  Please do not try to decode tones outside this range.

The Morse code WPM (words per minute) detection speed is automatically adaptive from about 8 to 40 WPM, and can be locked to the current estimated WPM dot speed.  You can also manually set the WPM code speed if the automatic speed detection guesses incorrectly.  A QRQ High Speed WPM mode setting allows decoding much higher WPM speeds in the range of 30 to 80 WPM.

Please aim your iPhone microphone at the Morse Code sound source so that the iPhone's noise cancelling microphone doesn't cancel it out.  You can see if sound is getting to the iPhone by seeing a peak in the spectrum display.  Please use the manual settings if automatic decoding does not adjust to the frequency, WPM. or background noise threshold level properly.  Decoding will not work if the audio filter or WPM are set incorrectly, or there is a lot of background noise or room echoes above the threshold setting.  Please see the help file on the HotPaw website for hints as to how to solve decoding issues.

## Key features

- Morse code sound to text translation
- Automatic and manual decoding modes
- Adjustable audio filter frequency
- Configurable WPM speed
- Background noise threshold adjustment
- Built-in spectrogram
- Optional narrow-band DSP audio filter

## Recent user reviews (10 of 104)

All indexed reviews: https://appshunter.io/ios/app/morsedecoder/id313071325/reviews.md

### 1/5 — Decepcionante

*2026-01-12, version 2.5.5*

Es la aplicación más decepcionante e inservible que he probado jamás. Lo peor es que es de pago y debería ser mínimamente aceptable pero es pura basura. No la recomiendo en absoluto. No se os ocurra comprarla. Escribe lo que quiere hace lo que quiere escucha lo que le da la gana.

### 5/5 — 4 years old and great!

*2026-01-06*

I think you have developed one of the best CW readers I’ve seen.
It’s a great aid to learning morse code 👍 73 de VK7WW

### 1/5 — Don’t Waste Your Money

*2025-04-04*

It’s easy to see why they do not offer a free trial on the software. It just freaking does not work.

### 1/5 — Looks great but doesn’t work

*2024-10-13*

I bought this app five years ago. I occasionally start it up to see if it finally works. It still thinks everything decodes a an “e.”  If you are going to charge a premium fee for an app, it should provide the promised service. This app fails to do so and I cannot recommend it to anyone.

### 5/5 — It works

*2024-05-19*

A CW decoder that is simple an works! Great job

### 3/5 — Works but it could be better

*2023-10-29*

It works, not with weak signals though. I use it when people try to ragchew with me and it freezes from time to time. I’m using it on an iPhone 14with lots of storage and I remove apps from memory when I’m not using. The app freezes not because of the device or lack of memory, it freezes because of a stack overflow.

I couldn’t find better decoder app on iOS yet.

### 1/5 — Enttäuscht

*2023-03-02*

Funktioniert überhaupt nicht, sehr teuer für so einen Schrott

### 2/5 — not very robust

*2023-01-10*

This app is not very robust to imperfect audio. I’ve had much greater success with GGMorse.

### 5/5 — Superb

*2022-04-17, version 2.5.5*

This is a fantastic app. It just works. I love it.

### 5/5 — Great app and great help to learn CW with instant feedback

*2021-10-10*

Very pleased with this app and worth the price.  I’m new to CW and this is helping to train my ears and finger coordination with instant feedback if my dits are correct. It really helped with my d,b,h,5,6.  Thank for the app.  Highly recommend.

## Frequently asked questions about MorseDecoder

### What does the Morse Code Decoder app do?

This app listens to Morse code sounds through your device's microphone or headset and translates them into text. It provides both automatic decoding for ease of use and manual controls for fine-tuning performance with weaker signals or noisy environments.

### What are the key features of the Morse Code Decoder?

Key features include automatic and manual decoding modes, adjustable audio filter frequency, configurable WPM (words per minute) speed detection, background noise threshold settings, a built-in spectrogram for analyzing tones, and an optional DSP audio filter.

### Is the Morse Code Decoder app free to use?

Yes, the application is available for free. There are no in-app purchases or advertisements mentioned in the provided description.

### What devices is the Morse Code Decoder compatible with?

The app is designed for use on iPhones and iPads. It utilizes the device's microphone or headset input for audio signal processing.

### How can I improve decoding accuracy with the Morse Code Decoder?

To improve accuracy, aim your device's microphone directly at the Morse code sound source to avoid noise cancellation. If automatic decoding struggles, utilize the manual settings to adjust the audio filter frequency, WPM speed, and background noise threshold. Refer to the help file on the developer's website for troubleshooting tips.

## Version history (last 5 releases)

### 2.5.5 — 2021-06-04

Bug fixes.

### 2.5.4 — 2020-04-20

Added Dark Mode support, plus enhanced compatibility with more recent iOS releases

### 2.5.3 — 2018-03-03

Bug fix for text scrolling.
The previous 2.5.2 update extended the range of the audio filter setting.

### 2.5.2 — 2018-02-15

Extended the frequency range of the narrow-band audio filter.
Added a warning when suspected noise is being decoded due to non-optimal settings.
Added a switch to disable the 20 minute auto-off timer.
Minor audio bug fixes.

### 2.5.1 — 2017-11-25

Updated for iOS 11 and the iPhone X.

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## More apps by HotPaw Productions

- [inTuna Strobe Guitar Tuner](https://appshunter.io/ios/app/intuna-strobe-guitar-tuner/id285074850)
- [Sing-inTuna](https://appshunter.io/ios/app/sing-intuna/id294767812)
- [HotPaw Basic](https://appshunter.io/ios/app/hotpaw-basic/id295464266)
- [MorseTest](https://appshunter.io/ios/app/morsetest/id297010360)
- [XOCubed (3D Tic Tac Toe)](https://appshunter.io/ios/app/xocubed-3d-tic-tac-toe/id303500525)
- [iAutoharp](https://appshunter.io/ios/app/iautoharp/id304091719)

All apps by HotPaw Productions: https://appshunter.io/developer/285074853

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-06.*