Hold your phone to the signal Read the Morse
DitDash Lab listens to Morse code from a radio, a speaker or a recording and writes it out as text while it plays. Letters that could be wrong are marked, so you know exactly which ones to check.
Free to start · Pro is a one-time $4.99 · No ads, no account
Four tabs, one for each way you meet Morse
Hear it, write it, key it, then find out how well you really copy.
It shows you which letters to double-check
Most decoders hand you text and leave you guessing. DitDash Lab marks only the letters that sat close to a timing line. Tap one to compare what it heard with the two letters it could be.
The last mark of K was a little short, so it sits near D.
Try it. Type anything
Letters, digits, punctuation, prosigns like <SK>, even Korean. It runs in your browser and nothing is sent anywhere.
Or key it yourself.
Press and hold the key, or the space bar. Short is a dit, long is a dah. Pause to finish a letter.
Misread Diagnosis: why your A came out as an I
In Practice, every mark you key is measured in units. When a letter reads as a different one, you see the mark that crossed the line and the smallest change that fixes it.
Your dash was 1.6 units, just under the 2.0 line, so it counted as a dit.
Hold it to about 3 units and it reads as A.
2.0-unit line· Shorter is a dit, longer is a dah
Find out how well you really copy
Ten words per run. Copy them by ear or send them on the key, then get a score from 0 to 100 and the letters you missed.
- Starter 10 WPM · wide spacing · easy letters Free
- Standard 15 WPM · every letter Pro
- Advanced 20 WPM · callsigns, numbers, Q-codes Pro
The microphone listens. Nothing leaves
Decoding happens on your phone. Audio is never recorded, stored or uploaded, and the app works offline.
- No recordingSound becomes text as it arrives and is then thrown away.
- No account, no adsOpen the app and start listening. There is nothing to sign up for.
- No trackingNo analytics or ad SDKs. Only crash reports and purchase receipts leave the device.
Free to use. Pay once if you want more
Everything you need to decode, write and practise is free. Pro is a single purchase, not a subscription.
Free
$0
- Live decoding from the microphone
- Write: text to Morse, sound and code
- Practice with Misread Diagnosis
- Starter tests
Pro
$4.99 one-time purchase
- Standard and Advanced tests
- Unlimited audio file decoding
- Longer recordings and every drill
- Export to M4A, ringtone and video
Questions, answered
SupportDoes it work with real radio audio, or in a noisy room?
Yes. It finds the tone and the speed on its own and copes with some background noise. Clean, steady signals read best. When a letter is uncertain, it's marked for you to check instead of being guessed silently.
Do I need an internet connection?
No. Listening, Write, Practice and Test all work offline. A connection is only needed to buy or restore Pro.
Is my microphone audio recorded or sent anywhere?
No. The microphone is on only while you're listening. Audio is decoded on your device as it arrives and is never recorded, stored or uploaded.
Can it write Korean Morse?
Yes. Type Hangul in Write and each syllable is split into jamo and sent with the Korean Morse table (SKATS). Double consonants and compound vowels are sent as their parts, so ㄲ becomes ㄱㄱ.
What does Pro unlock?
Standard and Advanced tests, unlimited decoding of audio files, longer recordings, every drill, and exports to M4A, ringtone and video. Live listening, Write, Practice and Starter tests stay free.
Is Pro a subscription?
No. Pro is a one-time purchase of $4.99, or the local equivalent in your store. There are no ads and no account. Restore it on a new device from Settings.
Start reading Morse today
DitDash Lab is coming to the App Store and Google Play for iPhone, iPad and Android.