Morse Key: Learn Morse Code

Sifter Apps

About this app

Morse Key turns your phone into a telegraph station. Tap the brass key for a dit, hold it for a dah, and watch each signal travel down the glowing Morse tree on a green CRT screen until it lands on a letter. It's the quickest way to see how Morse code really works.

LEARN BY TOUCH
• A telegraph key that feels right: a short tap is a dit, a longer hold is a dah, with a clean tone and a buzz under your finger.
• The live Morse tree shows where you are after every press. Dits branch left, dahs branch right.
• Your letters print onto a paper tape. Play the tape back and hear your message.
• Prefer two buttons? Switch to separate Dit and Dah buttons.

LEARN STEP BY STEP
• Lessons follow the tree one row at a time: E and T first, then I A N M, and on to all 26 letters.
• Then numbers, punctuation and prosigns like AR, SK and KN.
• Then real words, short phrases, Q-codes and ham radio shorthand such as CQ, 73 and QTH, each with its meaning.
• Hints light the path for new letters. Send a letter three times and it's yours.

TRAIN YOUR EAR
• Listen practice plays a character, and you pick what you heard.
• Letters you miss come back more often, and new ones come up first.
• Set the letter speed and the Farnsworth spacing: each letter at full speed, with time to think between them.

TRANSLATE AND SIGNAL
• Type any message to see and hear it in Morse, or type dits and dahs to read them back as text.
• Send it as sound, as light from your flashlight (or a flashing screen), or as vibration.
• Share the code with a friend.

MADE FOR PHONES AND TABLETS
• Designed for phones and for tablets in both orientations.
• Works fully offline, and your progress stays on your device.
• A full code chart with every letter, number, sign and prosign. Tap any of them to hear it.

Settings let you choose the tone pitch, speed, key timing, sounds and vibration.

Whether you're working toward a ham radio license, curious about the code of telegraphs and ships, or just want to send a secret message, Morse Key makes it simple, hands-on and fun.

What’s new

First release: the telegraph key, the Morse tree, lessons, listening practice and the translator.