NumDrill - Math You Can't Stop

Relying too much on calculators and AI? Get your number sense back. Drills from arithmetic to trig and logs. Compete on global leaderboards!

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

■ 10 Problem Categories

• Arithmetic (addition, subtraction, multiplication, division — customize digits & decimals)
• Quadratic expressions (factoring & expansion)
• Trigonometry (sin / cos / tan values)
• Square roots
• Logarithms & Exponents
• Ratio & Percentage (everyday percentage calculations)
• Make10 / Make24 (card-based number puzzles)
• Memory (memorize and recall grids of numbers & icons)
• Mastermind (deduce a hidden number sequence with logic)
• Calculator mode (Practice mental arithmetic using calculation patterns you frequently use in everyday life)

■ 3 Play Modes

• Count / Timed / 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.