Sparkith

This is a lightweight mental math practice app. Just open it and start—spend a few minutes a day honing your speed and accuracy in addition, subtraction, multiplication, and division. 【Three Training Modes】 • Quick Training: A mixed set of 20 questions—start immediately. • 60-Second Challenge: Solve as many problems as possible within one minute. • Custom Training: Select your own question types, difficulty levels, and number of problems. 【Instant Feedback】 Know immediately if your answer is correct. Consecutive correct answers build a "streak," helping you stay focused. 【Mistake Log】 Incorrect answers are automatically saved. Review and re-practice these specific problems anytime; they are automatically removed once answered correctly. 【Performance Statistics】 Track your daily problem count, accuracy rate, and best streak, as well as accuracy for each operation (addition, subtraction, multiplication, division). After sufficient practice, the app highlights areas needing improvement, allowing for targeted training with a single tap. 【Five Difficulty Levels】 Progress gradually from single-digit mental math to multi-digit calculations. Division problems always result in whole numbers, and subtraction problems never yield negative results. Ideal for students looking to improve their mental math speed, parents practicing with their children, and adults wanting to keep their calculation skills sharp.