It is a diary which can record having done every day easily.
It registers carrying out usually previously.
Then, having done with time is recordable only by choosing, before acting it.
Although a sample picture is Japanese, it is displayed also in English.
Of course, since it is a diary, it can be found what you were doing afterwards.
Moreover, it can also write having used the day by the text.
Although it is simple, I would like to add many things from now on only by a fundamental function now.