Hisanao Takahashi

Wordbook, it is easy to use.You can check your achievement, using check mode.It is easy to refer to

Wordbook, it is easy to use.You can check your achievement, using check mode.It is easy to refer to

Simple calculator The history of your calculation can be checkedThe history is editable and can be c

Simple calculator. You can check the history of your calculation. The history is editable and can be