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Morse Code

Dots, dashes, one letter at a time.

Morse Code teaches the code one character at a time. Write sends highlighted characters with dot and dash keys; Read copies them from a flashing lamp and optional tone. In Letters, drill any mix of the A-Z letters and 0-9 numbers; in Sentences, use real English sentences built only from the characters you know.

How to play

1. Choose Write or Read, Letters or Sentences, and a short or long session. Pick individual characters in the difficulty editor: every chosen character comes up, and Sentences use only words made from them.
2. Write: Use the dot and dash keys to enter the highlighted character. Hold the dot key for 350 ms to turn it into a dash; the hold meter shows the change.
3. Write: Pause for 900 ms after the last signal to send the character automatically, or tap Submit or press Enter. Starting another press keeps it open. Spaces between words advance automatically.
4. Write: On a keyboard, use Z or period for a dot and X or minus for a dash. Space also works as Dot, including holding for a dash.
5. Write: Correct and incorrect characters advance immediately. Compare your latest mistake with the correct code: the previous character, entered code and expected code remain until the next mistake. Review your mistakes from the session summary.
6. Write: Each correct character scores more the more characters you chose, plus up to 15 % for accuracy and a time bonus for pace. Mistakes earn nothing.
7. Read: Paced. Watch the code. When the pad says Answer now, press its character before the pause ends. Your first answer is final and starts the next character sooner. Use the character pad or an A–Z or 0–9 key.
8. Read: Paced. Wait for Answer now. You get one try during the chosen pause; a key outside your chosen set is wrong. If the pause ends without an answer, it counts as a miss. Keys do nothing during the lead-in, while a code is sent, between characters or after the run.
9. Read: in Paced, set Flash speed to 6, 8, 10, 12, 15, 18 or 20 wpm (default 10), and Pause to 3, 2.5, 2, 1.75, 1.5, 1.25, 1, 0.75 or 0.5 seconds (default 3). A shorter pause is harder. Tap a study character to flash its rhythm at the card’s flash speed, with the optional tone, before Ready.
10. Read: Ready starts the clock. Hidden pages and open popups do not pause it; you cannot answer there. In Paced shares and Versus, players get the identical character sequence, flash speed and pause limit. Each player’s transmission times depend on their own answers.
11. Read: the latest miss shows the sent code, your answer and the correct character. In Paced, points rise with the flash speed and with a shorter pause, plus up to 15 % for accuracy; there is no time bonus, so answering faster does not score more. Scoring assumes each pause is used in full.
12. Read: Choose Paced or Pro on the card; Paced is the default. Switching keeps your characters and flash speed. Entering Pro keeps the time if it is a Pro step, otherwise it uses 3 seconds; returning to Paced keeps the time. Pace and timing are fixed after Ready.
13. Read: Pro. The next code keeps playing. Answer the numbered top bar before it runs out. When it disappears, your next key answers the next open bar. Each character gets the same answer time after its code ends; windows can overlap. The oldest open character is the top bar, whose number and colour match the pad. Your first answer is final; each key answers at most one character. At the exact end of its answer time, an unanswered character is a miss. With no open bar, the pad says Receiving and keys do nothing.
14. Read: Pro keeps the same flash speeds and study screen. Answer time is 3, 2.5, 2, 1.75 or 1.5 seconds (default 3). A shorter answer time scores more, and Pro earns 15 % more than Paced at the same flash speed and seconds, before rounding. Both paces have up to 15 % for accuracy and no time bonus, and compete for the same best score in each Read variant. In Pro shares and Versus, players get the same scheduled stream, pace, flash speed and answer time; only their decisions differ. A Versus match fixes the whole setup.
15. Levels: Card notes name the characters you send (New) or read (First read) for the first time, and tell you when the pause or answer time changes.

What it trains

Recalling letter-to-code patterns and keeping dots and dashes in the right sequence. Explore Working Memory training →

Improvement figures are observed in-app score gains, backed by peer-reviewed cognitive-training research.

Difficulty

In Read, choose Paced or Pro and copy a flashing lamp at a flash speed of 6–20 wpm. Paced gives an answer pause of 0.5–3 seconds; Pro keeps sending with overlapping answer times of 1.5–3 seconds. 100 levels combine Write Letters, Read Letters, Read Sentences and Write Sentences: Read from level 2, words at 20, Write Sentences at 90. Ladder Read flashes at 10 wpm. Letters turns Pro in chapter 4 (level 37) and its answer times shorten; Sentences stays Paced. Four marathons include Clean, Long and Sprint, ending in The Grand Reception. Ladder 1 remains available with its progress. Ladder 2 starts a fresh frontier.

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