Clear, intuitive, easy and aesthetic

Sync seamlessly with Google calendar.
Good management of calendars, configurable.
Easy to use and clear display. I use it on a Samsung Galaxy Note 3 and this is the tool I expected.
Only small problem for me, but I do not have enough potash the trick, if I add participants to a meeting pro, the phone will directly send email invitations to people who are in my repertoire. This must be corrected.
I tested a lot of calendars and is certainly the best to date.