Microsoft confirmed its previously-reported acquisition of calendar app Sunrise, arguing that “we are making this acquisition because we believe a reinvention in the way people use calendars on mobile devices is long overdue”.

Financial details were not disclosed.

The computing giant said that the app will “remain in market and free after the acquisition”, and will continue to support a range of third-party apps and calendar services”.  With regards to its plans, it said “in the coming months, we’ll share more about how we’ll build on its success and apply Sunrise’s innovations to other Microsoft apps and services”.

Microsoft said that the deal, its earlier acquisition of Acompli, and new touch-optimised universal Office apps for Windows 10, “exemplify Microsoft’s ambition to rethink the productivity category”.

Sunrise collects calendar information from a range of services “in a helpful and automatic way, pulling relevant details from across your digital life”.

In a blog post, the founders of Sunrise noted that they are still working to “build an amazing team” and “build the best product to help you manage your time” under Microsoft’s ownership.