NumDrill - 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 ■ 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.