BrainRash Brain Games
MathDoku — Number Logic
Daily math logic, calm focus. Fill each row and column with the numbers 1 to N without repeats, while the cells in each outlined cage combine — add, subtract, multiply, or divide — to hit its target. No guesswork. Just clean, deductive logic.
Six difficulty tiers
180 hand-curated, uniquely-solvable puzzles from Easy 4×4 all the way up to Grandmaster 9×9. Earn stars and best times, and unlock the next world as you sharpen up.
A free puzzle every day
A fresh Daily Challenge every calendar day — the same puzzle for everyone — with a streak that grows the longer you keep showing up.
Smart hints that teach
Stuck on a cage? Hints point you to the next logical move, never the answer, so you build real deduction skills instead of leaning on solutions.
Five gorgeous themes
Pick the mood — Parchment, Midnight, Meadow, Orchid, or Sunset — then crush the grid. Subtle sound and haptics celebrate every correct placement.
Compete & share
Game Center leaderboards and achievements when you want to compete, plus a shareable solve card so you can flex on the group chat.
Yours, offline, forever
Fully offline. No accounts, no network, no ads, no interruptions. Color-blind palette, VoiceOver, Dynamic Type, and right-to-left layout for Arabic. 11 languages.
Need help?
Visit our dedicated support page for FAQs and to contact the team directly.
MathDoku Support & FAQ