The iOS Calendar app is pretty basic, but for a lot of people, it gets the job done. If you're left wanting more, take a look at Horizon Calendar, which is US$1.99 in the App Store. We've taken a look at an earlier version of the app before, and this next generation, released today, adds more features and improves the GUI.
Horizon Calendar is part calendar, part weather app. It pulls your current calendar info from your iOS device and stays synced to the cloud. The app arranges your info into a very nice set of screens that is easy on the eyes and well