Mental Calculation - Quick app for iPhone and iPad
This app can exercise quick mental arithmetic skills.
You can enter the corresponding calculation type page on the "Home" page and click the "Start" button. A correct answer can earn 5 points, while a wrong answer can earn 5 points until 0 points are reached. Clicking the "End" button and the "sure" button will result in a score record.
You can view the score record on the "Mine" page.