My Special Custom Calculation app for iPhone and iPad

This is a tool that can customize calculation practice according to your arithmetic ability. You can choose different difficulty levels and special numbers that you are difficult or want to practice. At the beginning of the exercise, you need to choose the arithmetic type and number to make the calculation equal to the randomly generated answer. If the equation holds, you will be able to successfully enter the next question and continue to challenge. You can help you analyze your practice proficiency according to your highest score.