Arithmos: Mental Math Drills

Arithmos turns mental math into a game. Race the clock in fast arithmetic drills, climb an ELO leaderboard, challenge friends live, and unlock puzzles that train speed, focus, and number sense — all in a clean, distraction-free design.

Whether you're prepping for exams, building calculator-free confidence, or just want a sharper brain, Arithmos gives you a new way to practice every day.

★ TIMED ARITHMETIC DRILLS
Solve addition, subtraction, multiplication, and division problems against the clock. Fully customizable — pick your operations, number ranges, and round length. Classic zetamac-style speed training, your way.

★ 32 PROGRESSIVE LEVELS
Work through a structured level path that ramps difficulty step by step, with your completion percentage tracked right on the home screen.

★ QUESTS — BUILD YOUR OWN DRILL
Design a custom quest with the exact operations, ranges, and timer you want, save it, and replay it whenever you like.

★ FOUR BRAIN PUZZLES
• Largest Number — build the biggest number you can
• Prime Hunt — spot primes under pressure
• Sliding Puzzle — classic number-sliding logic
• Shape Arithmetic — decode shape equations before time runs out

★ ELO RATING & TIERS
Every result changes your rating. Climb through five tiers — Scholar, Mathematician, Professor, Genius, and Legend — by beating higher-rated players, and track your progress on the ELO Standings board.

★ GLOBAL LEADERBOARDS
Compare your best scores and speed against players worldwide, with country flags on every leaderboard entry.

★ PLAY WITH FRIENDS
Create a private room, share a code, and race friends live — same questions, same clock, real-time results, and instant rematch.

★ YOUR PROFILE, YOUR WAY
Sign in with Google, pick a gamer ID and country, choose whether your name shows on leaderboards, and switch between light and dark themes.
WHO IT'S FOR
Students sharpening exam speed, competitive test-takers who need fast mental math, teachers and tutors looking for warm-up drills, and anyone who wants a quick, satisfying brain workout between tasks.

Arithmos is minimal by design — no clutter, no distractions, just numbers, a timer, and your progress. A few minutes a day is enough to feel the difference.

Download Arithmos and start your first drill in seconds.