If you want to use this application in English version, please use "Chatting Math Drill" in our App.
(Same contents with English version)
According with recent neuroscience paper, repeating mental arithmetic enables to strength brain function and to prevent brain from dementia.
And mental arithmetic is also effective for increasing power of concentration and endurance.
Furthermore, with voice-only application, it is possible to do mental arithmetic and body exercise simultaneously, which is said to be more effective for preventing brain from dementia.