Activity tracker company Fitbit launched a native app for Windows 8.1 that integrate data from a user's Fitbit device via Bluetooth. The company said they are the first company to offer an app for Windows 8.1 that directly syncs to a digital health device.

The app has most of the features that are also in the iOS and Android versions of the app including food logging features, statistics and graphs that show the user's past activity, motivational reminders to stay active, and a social network in which users share fitness updates with the Fitbit community. Fitbit's iOS app is still the only version of the Fitbit app that offers passive activity tracking features. It does so by using the iPhone's M7 processor.

“At Fitbit, we know that giving our users instant access to real-time stats right on their smartphone increases motivation to achieve goals and, ultimately, make healthier choices,” Fitbit CEO James Park said in a statement. “Windows Phone is projected to be the fastest-growing smartphone OS platform, so supporting this platform is important so that all of our users have access to their stats, no matter which phone they choose."

News site Neowin also pointed out that along with this launch, Microsoft and Fitbit are offering a bundle price for the Fitbit Flex and the new Nokia phone, Nokia Lumia 635.

Fitbit is not the only digital health company in recent weeks launch an app specifically for Windows Phone users. Last week, electronic health record company Allscripts launched a native app for Windows 8.1 devices, called Allscripts Wand.