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No. 1

·July 18, 2026
every letter is a digitfailed checks 0
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Tap a letter, then a digit — or just type.
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About Cipher

Cipher is a free daily cryptarithm game from Source of Truths. Each day serves one alphametic equation — the classic puzzle form where SEND + MORE = MONEY and every letter hides a digit. Assign a different digit to each letter so the arithmetic works, and know that the puzzle is machine-verified to have exactly one solution: if your logic is sound, you never have to guess.

The craft is in the columns. The leftmost letter of the answer is usually forced by a carry; from there each column narrows the field until the whole equation clicks open. A clean solve on the first check is a perfect 10 — every failed check costs a point, and the daily leaderboard breaks ties by fewer failed checks, then time.

A new equation drops every day at midnight Eastern. No app, no signup — play free in your browser, keep a streak, and race the daily leaderboard. More dailies: Suds, our daily sudoku, Tally, our number-balancing game, and Alibi, our whodunit logic puzzle.