Cramming Arithmetic Trainer vs (Open Source) Mental Math

Cramming Arithmetic Trainer helps you build fast, confident mental math skills with whole numbers up to 100. Whether you're a student learning the basics, an adult keeping your mind sharp, or someone preparing for a test, a few minutes of practice a day makes a real difference. The app keeps things simple and distraction-free, wrapped in a friendly design that's easy on the eyes. FOUR CORE OPERATIONS • Mental Addition - find the sum • Mental Subtraction - find the difference • Mental Multiplication - find the product • Mental Division - find the quotient PRACTICE YOUR WAY • Manual mode: choose the numbers yourself and drill exactly what you want • Automatic mode: let the app pick the next problem for you, so you can focus purely on answering • Increase and Decrease buttons adjust the difficulty up or down whenever you're ready LEARN AND REVIEW • Study the built-in addition, subtraction, multiplication, and division tables. • Scroll through the examples to memorize patterns and reinforce what you've practiced. • Track your results on each arithmetic operation (count of correct/wrong answers and timer score). • Get help with hint system after several incorrect answers. SIMPLE AND CLEAR • Tap-to-answer format with instant feedback - wrong answers just let you try again, no pressure • Clean, uncluttered screens designed for all ages • Easy navigation with a back button always in reach MULTIPLE LANGUAGES Change the interface language right from the main menu. Regular practice is the fastest way to memorize the tables and develop real mental arithmetic skills. Open the app, pick a section, and start training.

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 — 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. 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, haptics, and sound. 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