"Difficulty goes up!"
Every time you answer 20 questions correctly, the number of digits in the question will increase and the difficulty level will increase.
Let's challenge how long we can continue to solve!

"You can see the improvement in computing power"
The result of each training is saved, and you can see the transition of the number of correct answers in a line graph.

"Let's change the theme according to your mood"
With the "Theme" function, you can completely change the atmosphere of the app and customize it to your favorite shades.