Crack the secret code
The secret is a 3- to 5-digit code using digits . A new one every day, on three levels.
Each position has its own color and symbol:
Read the rule cards
Each card asks a question about the code and lists every possible answer.
The secret gets exactly one answer, and the card secretly knows which.
Test a code
Type any code, then tap Check on up to 3 cards. ✓ means the secret gets the same answer as your code; ✗ means it doesn't.
Rule things out
Tap card answers and note digits to cross them off. When only one is left, it lights up.
Swipe between two screens
The cards are on one screen. Your code, keypad and notes are on the other.
Swipe left or right, or tap the tabs at the top, to switch.
Submit one final answer
Submit final answer…
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🔓 5 checks in 2 rounds
When only one code fits, submit it. You get one try, and fewer checks is a better score.
Watch for tricky cards: they say how far apart two digits are without saying which is bigger, or check against one of two digits.