The calendar is not completed, it is impossible to use it, because it is gray and blind to the eyes, so I give a true rating of three stars.
I will explain:
When I look at the week section, I can never understand at what point in time the event is. In the event at the beginning of the line, the time is simply not indicated. And also, in the left edge of the window in the time column, the numbers are so small and gray that with my eyesight (I have a slight cataract) I can not see anything at all. In the application settings, too, you cannot change the font, for example, make it larger and completely black.
In the application settings, some important fonts cannot be changed! But original fonts small and gray. Very Badly!
So this application is not useful because the font in the program is very gray and very small. I do not recommend you this program. The program costs 50 € and for the money it should be convenient, but it is not.
Thank you for reading to the end.
PS: I will also notice that all applications for Apple have the same problems with eyes, so people Refuse Apple.