Use this app now for over a year now and am more than satisfied. It has very many possibilities to adjust the calendar to his personal needs. Also you can then einbleden a widget which eg appear .: the days events. Absolutely TOP is that you can make everything in color. Which calendar should have what color, color of Sat & Sun etc. Clearer It could not, and can not be compared with the pre-installed calendar. What I find very pleasant also that you can hide the different calendars rapidly. SO I have the company calendar displayed only Mon-Fri, and Friday is a click (or touch) and already the company appointments are forgotten! :-)!
Since I am a "lazy" person, and entries me everything, I highly recommend him. For forgetful people a clear Organizers need absolutely top.