Morse Decoder for Ham Radio

208 reviews
Content rating
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About this app

Morse Decoder decodes Morse code characters through the built-in microphone of your Android device.

Morse Decoder can be used by Ham Radio (Amateur Radio) operators or anyone else interested in decoding Morse code from a Radio or any other device.
Morse Decoder includes a "waterfall" to show a frequency spectrum of about 50Hz to 2300Hz. A narrow band DSP filter can be set for the frequency of the Morse code tones by tapping the waterfall. The DSP filter is followed by an automatic gain control (AGC) to compensate for changing signal strengths.
The detected signal will be shown as a graph and several algorithms will then detect the speed of the Morse code and convert them into readable text. Speeds of less than 4 Wpm (Words per Minute) to more than 50 Wpm can be decoded.

For any question please visit our new forum at

This is the first version of Morse Decoder.
It has been tested on several Android devices and it performed very well or even better than PC based decoding software. However, since we are not able to test the performance on all 150+ Android devices there is the possibility that Morse Decoder will not work on all devices. If Morse Decoder doesn’t work on your device you can uninstall Morse Decoder within 15 Minutes for a full refund (This is the time frame given by Google and I am not able to change it). If the 15 minutes passed and you are not happy with Morse Decoder email me as soon as possible at Please include your name and the model of your phone in the email. I will then refund you the money as fast as possible. It is important that you include the model of your device. I will try to find the cause for the malfunction or include your phone model in a list of “not working” devices.
Updated on
Mar 14, 2017

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208 reviews
Robert Walz
February 27, 2021
Poor. There are no settings to adjust. I used a tone program with different speeds and different output frequencies and even different speakers. The app picked up less than 10% of the correct letters. The graph represented the pulses clearly so I'm not sure why the transcription failed.
11 people found this review helpful
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A Google user
May 20, 2019
I am really quite impressed with this app. Ive been out of the hobby so long my CW attempts were so rusty it needed an angle grinder to clean it up. This in conjunction with other apps helps to build up confidence again and is a great learning tool as well as a general purpose reader. Works well on a Galaxy Note 8. Money well spent IMHO. Thank you for your efforts.
24 people found this review helpful
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David Murray
May 17, 2021
I really wanted this to work so I bought it a second time. This time I did a better job of isolating the input from other sounds. It seems to be working although I haven't been able to find suitable very high speed for testing. I'm going too keep it this time and modify my review. Motorola Moto Z4.
5 people found this review helpful
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