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Math You Can’t Stop
Can you still calculate a tip, split a bill, or work out a percentage in your head?
Every time you reach for a calculator or ask AI, your mental math skills quietly fade. The good news: they come back fast with regular practice.
NumDrill is a focused mental math drill app designed for short, satisfying sessions. Instead of mindless scrolling or another mobile game, sharpen the brain you already have.
Who it’s for
- Anyone whose mental math has gotten rusty from over-relying on calculators or AI
- Students preparing for exams or standardized tests
- Professionals who want to stay mentally sharp
- Anyone who suspects they’re wasting time on games but keeps playing anyway
5 Problem Categories
- Arithmetic (addition, subtraction, multiplication, division — customize digits & decimals)
- Quadratic expressions (factoring & expansion)
- Trigonometry (sin / cos / tan values)
- Square roots
- Logarithms & Exponents
4 Play Modes
- Count / Timed / Sudden Death / Endless
Features that keep you coming back
- Streaks / Combos / XP / Global Leaderboards / Social Share
Customizable
- Difficulty / Advance rules / Sound & Vibration
Your brain is a muscle. Five minutes a day is all it takes. Open NumDrill.
iOS
Android