Turn tricky math into reflexes.
Train your mental math for case interviews, school, or just for the fun of getting faster.
Built for the numbers that matter
The exact math that shows up when speed counts
Mathy is a fast, focused mental math trainer for consulting case interviews, exams, homework, business estimates, and everyday brain training. Practice the patterns until they feel natural.
Addition & Subtraction
From quick warm-ups to large-scale numbers, with mismatched magnitudes that keep you sharp.
Multiplication
Clean, practical values from times-table reps to round-base figures that mirror real estimates.
Division
Answers that always land cleanly as whole numbers. No messy remainders, just fast division.
Percentages
Percent of a number, percent of a percent, and reverse percentage problems. The consulting staples.
Market-Share Math
Practice "X / Y = ?%" calculations built to land on clean figures, just like real case math.
Fraction Simplification
Reduce fractions to lowest terms and sharpen the pattern recognition that makes the rest faster.
Practice modes
Choose the mode that fits your moment
Set your difficulty, or let Mathy surprise you with a random level. Scale from simple times-tables to market-size numbers in the millions.
Timed Round
Build speed under pressure and see how many you can clear before the clock runs out.
Fixed Set
Deliberate practice in sets of 10, 20, or 50 questions. Perfect for a focused daily drill.
Endless Mode
Warm up, find your flow, or settle in for a long training session with no finish line.
More than a quiz
Train smarter, not just faster
Mathy adapts to your level, teaches the shortcuts behind every answer, and tracks your progress so each session moves the needle.
Difficulty that scales with you
Easy, Medium, Hard, or Random. From times-tables to market-size numbers in the millions. Pick your level or let Mathy mix it up.
Estimation mode
Switch on estimation and answers within ±5% count. Training the fast rounding judgment that real case math rewards.
How Mathy would solve it
After every session, open any problem for a clean, step-by-step breakdown of the shortcut that gets you there fastest.
Track every gain
Lifetime accuracy, average time per question, and personal bests for each difficulty, so you can see yourself getting sharper.
Build a streak
A day streak rewards showing up. Short, daily reps are how mental math turns into reflex.
Daily reminders
An optional nudge at a time you choose, and it smart-skips any day you've already practiced.
See exactly where you're improving
After every session, Mathy shows a clean results overview with your answer, the correct answer, and how long each question took - and you can open any problem to see how Mathy would solve it, step by step.
| Problem | You | Answer | Time |
|---|---|---|---|
| 90% of 1,500 | 1,350 ✓ | 1,350 | 3.2s |
| 763,000,000 ÷ 7 | 109M ✓ | 109,000,000 | 6.8s |
| 45,000 / 300,000 | 12% ✗ | 15% | 5.1s |
| 432,000 × 3 | 1,296,000 ✓ | 1,296,000 | 4.4s |
Private and built for speed
Mathy is fully offline. There's instant feedback, zero lag between questions, and a native iOS experience that gets out of your way.
- No accounts - open the app and start drilling.
- No tracking - no analytics, no ads, no profiling.
- No data leaving your phone - everything stays on device.
- No network required - practice anywhere, anytime.
Sharper mental math starts now
For interviews, school, or the simple satisfaction of getting faster: open Mathy and start drilling.
Mathy is now in public beta on TestFlight.