Crack the code, alone or head-to-head.
Quick match, an open board of standing challenges, a six-character invite, turn-based play, or a challenge aimed at one friend.
Hunt one shared code together, or write the code your opponent has to break while they write yours.
No email, no password, no account to make. Solo boards work with no network at all and report themselves when you are back.
A soft, friendly take on bulls-and-cows: three, four or five digits, played solo or against someone else.
A friend is somebody who might be asleep. Play a guess at a time, whenever you both get to it.
A solve ends a duel only once both sides have had an equal number of turns, so moving first is never an advantage.
People are added by a code they read out to you — there is no searchable directory of strangers here.
Follows your phone, or override it in Settings. English and Turkish throughout.
Crack secret codes by pure logic — then duel another operator for the pot, build a mining empire, and raid rival syndicates.
Simplify your choices with Optio. The premium, ad-free cyberpunk decision-making experience for iOS.
Test your speed and math skills in this fast-paced game. How fast can you calculate?
