The app syncs with Facebook Events, Google Calendars, Exchange calendars and iCloud calendars and contacts, allowing it to predict who you'd want to invite to events as well as where you'd like to host events. The app also integrates with Any.DO, adding your to-do list to the calendar instantly. On their website, Any.do says that what sets Cal apart is that it can help you find time for other things:
Existing calendars only focus on meetings & things you have to do. Cal offers a different approach. Cal helps you find time in between meetings. We call these moments ‘gaps’ and we believe they are key to help you have a good day. Used intelligently, these ‘gaps’ are true opportunities to help you find the perfect balance between work and play.Any.do notes that it plans on creating email and notes apps that will seamlessly connect with both Cal and Any.DO to create a suite of apps that help people make the most of their days.
Cal for iPhone is a free app available now in the App Store. [Direct Link]