Mental Math vs (Open Source) Mental Math

Train your brain. Sharpen focus. Improve mental speed. Modern life constantly fights for your attention. Notifications, multitasking, and digital noise make it harder to stay mentally sharp. Mental Math: Focus Trainer helps you rebuild focus using short daily mental math training sessions designed to improve concentration, processing speed, and mental clarity. This isn’t about becoming a math expert. It’s about using simple mental math exercises to activate your brain and enter a focused, high-performance state. Just 5 minutes of brain training can reset your attention and prepare you for deep work. HOW IT WORKS Think of it as a quick brain workout. A short session of mental math practice clears mental fog, activates focus, and strengthens your ability to concentrate. Use it: • before a deep work session • before studying • before an important meeting • as a daily brain training habit CORE FEATURES Performance Test (100 Questions) • measure mental speed and accuracy • track completion time • track accuracy • see questions per minute • get an overall performance score Mental Math Training Practice core arithmetic operations with multiple difficulty levels: • addition • subtraction • multiplication • division Choose the difficulty that matches your skill and gradually increase the challenge Custom Exercises Create your own mental math training: • choose operations (+ − × ÷) • choose difficulty levels • choose number of questions Progress Tracking • track mental speed • track accuracy • see progress across different difficulty levels • improve consistency over time Minimalist Design • no distractions • no noisy gamification • clean dark-mode interface WHY TRAIN MENTAL MATH? • improve concentration • boost mental processing speed • prepare your brain for deep work • build a daily focus ritual Reclaim your focus. Train your brain. One number at a time. Terms of Service: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://denyskt.github.io/mental-math/

A free, open-source mental math trainer. No ads, no paywalls, no locked content — every exercise and difficulty is included. Sharpen your arithmetic with quick timed tests, custom drills, and a library of mental-math tricks. Everything runs offline and your progress stays on your device. FEATURES Timed Tests A daily 60-second challenge plus sprints, a two-minute marathon, per-operation tests, and a hard mixed test — at four difficulty levels, each with best scores. Custom Trainer Pick a number domain (Times tables, Natural, Decimal, Money, Huge), choose one or more exercises, and set per-exercise difficulty from Easy to Super hard. All the Operations Addition, subtraction, multiplication, division, squares, square roots, fractions, percentages, and modulo. Mental Math Tricks Dozens of step-by-step tricks for faster addition, subtraction, multiplication, division, and squares — with worked examples and favorites. Practice Any Trick Every trick comes with a 60-second drill built for it: × 11 drills, squares ending in 5, numbers near 100, and more. Magic Square A number puzzle: make every row, column, and diagonal add up to the same total. Four levels, from 1-9 up to bigger number sets. Progress Tracking Solved totals, accuracy, best run, daily streak, longest streak, and a weekly activity view. Fast Sessions An on-screen keypad with instant answer checking and haptics. No ads. No paywalls. No account required. 100% Open Source The complete source code is public - see it, audit it, or contribute at https://github.com/Open-Apps-Studio/mental-math