By HotPaw Productions

  • Category: Utilities
  • Release Date: 2009-04-25
  • Current Version: 2.5.3
  • Adult Rating: 4+
  • File Size: 3.51 MB
  • Developer: HotPaw Productions
  • Compatibility: Requires iOS 9.3 or later.
Score: 3
From 79 Ratings


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.



  • Battlefield 1 console users need this

    By Bouchon-5
    I hated trying to import my Morse code to the computer. It took way to long. This made my life so much easier. Held it up to the tv and gave me what I needed to move on.
  • Battlefield one help

    By Songbird 2477
    Used the app to decode the Morse on battlefield one and it worked perfectly. So worth it!
  • Theft by deception

    By Ejb5oh
    App is highly unreliable and basically does not work. Save your money. Very sad to have been allowed for sale in the App Store.
  • Save your 10 bucks

    By YXznvsz.79
    Another unusable app regardless of the hype and excuse written instructions 2 hours of “ adjusting mic position, volume levels and nothing but cryptic decoding. Not usable and only attempts code to alpha and does it poorly
  • Everything is an E

    By zuanqioc skccwjalcosbcmsjxv
    At least every other letter this app detects is an E. If there is background noise you have no chance, it will get no sound or it will get all the wrong sounds. I do not recommend getting this app.
  • Pretty Sad

    I have tried repeatedly to get this to decode cw. I see others have had success, but not me. Tried all settings it likes the letter E but thats it. Don't bother, learn cw the proper way and decode with the grey matter between your ears. 73
  • Cool little App!

    By mtmapmaker
    I didn't know what to do expect but I tried. I really expected a serious learning curve, but it worked right away. I made no changes at all -- just held my phone by my radio speaker and like magic the letters appeared. I did morse code in the Army 50 yrs ago and don't remember much more than CQ for asking a station to respond and the 5 or 6 alpha numerical of a call sign, but there they were-- over and over. I put it on my ipad3 and it works just as well. I clicked on the filter and it seemed to work a bit better than the phone. I'm very satisfied!! Glad I spent the cash!!
  • Is this a joke???

    By Paulie61903748393784
    I tried every setting, read the instructions, went to your website, tried contacting someone, no reply. This could be the worst app ever made. It does the exact opposite of what I expected. When I try to spell something in Morse code as simple as SOS, it reads it as AFFFFFFFFFF F F F F A AAA A, so I have no idea how this app gets a 4.5 average rating. Oh yeah and, $10?!?! I could live on that much a day, and get by.
  • The only working Morse decoder app

    By oceans777
    I'm not a fake review and this worked very well with my Icom IC-R8600 and RFSpace SDR receivers just using speaker output audio. Set to fast rate and narrow filter and don't blast the signal if you have any noise or background static - watch the magic happen. Great app for HF. Thanks app guy or lady. Enjoy the burger I bought you.
  • Battlefield 1 Easter egg solved

    By Mememememeyouyouyouyouyou
    I though the reviews were the owners bs but I went ahead and tried it out and it worked perfectly without ANY tweaking. I'm already on the 4th stage of the phantom program in 20 mins. You simply just hold your phone up and let it listen to the Morse code... absolutely perfect app. Gamer tag AK-47kreyer