Train mental math with short timed drills. The app works fully offline, and your progress stays on your phone.

Mental Math Challenge helps you build speed and accuracy across addition, subtraction, multiplication, and division. Type every answer on a number keypad instead of guessing from multiple choices. After each round you get a clear score, then you can review the questions you missed.

Focused practice
• Short timed rounds make it easy to practice every day
• Keypad entry builds genuine recall and calculation speed
• Results show your score, accuracy, and best streak
• Choose Normal or Hard to match your current level

Five practice modes
• Addition: start with familiar sums and work up to larger addends
• Subtraction: practice accurate calculations with non-negative results
• Multiplication: strengthen times tables and wider factor ranges
• Division: solve clean problems with exact integer answers
• Mix: rotate through all four operations in one session

Daily practice
Complete one consistent drill based on your device date. The question set stays the same throughout the day, so you can focus on improving your own time and accuracy.

Learn from mistakes
Review missed questions after a round and revisit the calculations that need more attention. Save favorite problems for later so you can return to the ones that still feel slow.

Private and offline
• Practice without an internet connection
• No account is required
• Progress, streaks, history, and mistakes stay on your device
• Export or import a local JSON backup when you want a copy

Make it your own
Choose your round duration and difficulty. Turn sound and haptic feedback on or off. Set an optional daily reminder if you want a nudge to keep the habit going.

Who is it for?
Mental Math Challenge is made for students building arithmetic skills, adults who want a short daily workout for their mind, and anyone who prefers calm, focused calculation practice without ads or extra noise.

Pick a mode, start the timer, and sharpen one answer at a time.