Fully configurable

The best calendar app (I have tried almost all the calendar apps in the store).
I have been using it since one of the very first versions.
Points of strength:
- weekly view similar to that of traditional organizers
- you can configure and personalize almost anything
- you can move/copy events by dragging them (useful if your schedule change continuosly)
- support is professional
- continuos updates and improvements

Paolo Cremonesi about CalenGoo Calendar, v1.5.19