Description

• It is an application that allows you to test and train mental arithmetic.
• Whether you are confident in your memorization ability or not, please try it out with this app.
• You can test your memorization ability with people from all over the world anytime, anywhere.
• You can also customize the speed and number of digits, so you can train at the level that suits you.
• Please try the world ranking when you get the ability.
• Rankings are also divided into levels according to ability.
• You may be able to aim for the top ranking in daily training.
• Please use it to prevent blurring, kill time, develop the right brain, and brag about it! !!