Powerful and well-integrated calendar
I wanted something that would improve upon the built-in calendar apps interface (read: month view on my iPhone and integrated todo) but still integrate with the built-in Calendar and Reminder info and tools (so I can still use Siri for scheduling etc.). Awesome Cal (with WidgetCal) fits the bill and then some! Highly recommended.
Forcoop about
Awesome Calendar, v5.2.3