치매예방 두뇌운동

Dementia prevention brain exercise app is an application created to help even a little to prevent dementia of adult gods through simple numeracy, quickness, memorization, and cognitive ability.
It is an application made by middle-aged sons thinking about their parents and elderly people who became elderly.
All the contents of the app are free, so please enjoy it with ease.
I hope that our application will help a little bit to prevent dementia among adult gods.