Microsoft has confoirmed the acquisition of Sunrise, provider of a calendar app for iOS and Android. "We are making this acquisition because we believe a reinvention in the way people use calendars on mobile devices is long overdue. Our goal is to better help people manage and make the most of their time in a mobile-first, cloud-first world," Microsoft said.

The acquisition of Sunrise, the recent acquisition of Acompli, and the new touch-optimized universal Office apps for Windows 10 all exemplify Microsoft’s ambition to rethink the productivity category.

By connecting your calendar with a range of services, the Sunrise app provides a far better view of your day, week or month ahead. It acts in a helpful and automatic way, pulling relevant details from across your digital life.

Microsoft says the Sunrise app will remain in market and free after the acquisition. It will continue to support a wide range of third-party apps and calendar services.