CCal 11 Pro is a sophisticated and intelligent calendar application designed for iPhone and iPod Touch. It is the perfect app for individuals who need to efficiently manage their busy schedules. With CCal, users can easily arrange their events and plans with its intuitive user interface and convenient features.

One of the standout features of CCal is its "drag & drop" functionality, which allows users to create and modify events by simply holding their finger on the screen/event and moving it to the desired date. Changing the date of an event is as easy as dragging it to the desired destination.

CCal also offers customization options, allowing users to choose from a variety of colors to create individual events and manage their plans. The app supports iPhone's standard "shake to undo" function, providing multiple Undos and Redos for added convenience. Copying and pasting events, as well as deleting events by dragging them to the trash, are also supported by CCal.

In addition, CCal offers advanced features such as customizing background colors based on the day of the week or individual event's existence. The app supports international time zones, with more than 400 regions available. Users can choose to input times using a spinning-wheel or an easy and quick ten-key.

CCal also provides a continuous "scroll mode" that displays the current month and the following month without dividing the schedule by the month boundary.

Please note that CCal 11 Pro has the same features as CCal 11 free, but it requires an in-app purchase upgrade. Users of CCal 11 free with the in-app purchase upgrade cannot download CCal 11 Pro for free. CCal 10 and CCal 11 are separate apps, and creating and displaying Reminders items is not supported in iOS 5.

CCal 11 Pro supports English and Japanese localizations.