Sunrise is known to build suite of calendar products for mobile as well as desktop.
Moreover, Sunrise's Calendar app supports multiple platforms as well as devices, which has helped it gain traction. Obviously, Sunrise makes calendar products that compete with Microsoft's own products, one of the reasons why the tech giant decided to acquire it. The software giant has spent at least $100 million for its latest acquisition, reports Techcrunch. Microsoft has been implementing some changesto make a mark in the mobile segment, and the newest move comes in the acquisition of calendar app maker Sunrise.