Numbio (formerly FastMath) turns mental math into a fast, satisfying daily habit. Train arithmetic, master your times tables, and watch your calculation speed climb in just a few minutes a day.

WHY NUMBIO?

Practice that adapts to you: difficulty scales from Easy to Extreme as you improve.

Bite-sized sessions for any schedule: a 60-second speed test or a full training plan.

Actually fun: turn drills into a game and keep your daily streak alive.

PRACTICE EVERYTHING

Free core arithmetic: addition, subtraction, multiplication & division

Times tables, digit sums, mixed expressions & chained operations*

Word problems, equations, rule of three, fractions, GCD & LCM*

Advanced operations: percentages, squares, square roots & modulo*

Every number type: decimals, money, fractions, binary, Roman numerals & more*

Build your own custom training plans: practice exactly what you want*

LEARN THE TRICKS

Step-by-step mental-math tricks and shortcuts that make hard sums easy

Practice any trick right away with a matching, ready-made drill*

A personalized "For You" feed that suggests what to learn next*

PLAY & COMPETE

Brain-teasing games: Number Hunt, Magic Square, Sudoku & Mini Sudoku

Climb Game Center leaderboards and unlock dozens of achievements

TRACK YOUR PROGRESS

Build daily streaks and hit personal goals that keep you coming back

Earn XP and level up through ten ranks, from Bronze to Diamond

Watch your speed and accuracy climb with detailed stats and personal bests

Set daily reminders so you never break your streak

ON ALL YOUR DEVICES

Cross-device sync keeps your progress in step wherever you practice

Jump in within seconds from Home Screen and Lock Screen widgets

Family Sharing: share Numbio Pro with up to five family members

Available in 29 languages

PERFECT FOR

Students building arithmetic confidence • Test-takers prepping for GMAT, GRE & entrance exams • Professionals staying sharp • Parents and kids learning times tables • Anyone who loves a good number puzzle

Join thousands of learners worldwide sharpening their mental math with Numbio.

Questions or feedback? We'd love to hear from you at [email protected].

Requires a Numbio Pro subscription.