Windows Phone 8.1 release date: A leaked schedule of the Windows Phone 8.1 release date was recently spotted by the world famous EV Leaks, showing that it maybe rolling by next month and will continue into August. And the rumored roll out was further amplified lately when an app developer confirmed that it’s already developing app for the yet to be launched platform.

According to WPCentral, Fitbit confirmed that it’s making an app for the Windows Phone 8.1 It’s a sign that the new OS upgrade will be released very soon, as app developerd are already preparing for it.

In a report by the International Business Times, it noted that along with the announcement of the Lumia 930, Lumia 630 and Lumia 635 at the April Microsoft Build Conference, Nokia confirmed that the Windows Phone 8.1 would be available for all Lumia Windows 8 smartphones as an over-the-air (OTA) update beginning this summer. The roll out will also include Lumia 1520, Lumia 1020, and Lumia 520.The Microsoft-owned mobile maker did not disclose a specific date for the rollout.

EVLeaks released a roadmap from Nokia via Twitter revealing the Windows Phone 8.1 update release schedule for the Lumia handsets. The tweet reads, “Schedule for rollout of Cyan – Nokia-specific Windows Phone 8.1.”

The IB Times noted that the roadmap is for the Benelux region, but considering Nokia affects a rollout in most regions in a timely manner, the Windows Phone 8.1 release will not be much delayed and is expected to reach other regions around the similar time frame.

Handsets listed in the roadmap for an update are: Lumia 920, Lumia 820, Lumia 620, Lumia 520, Lumia 720, Lumia 925, Lumia 1020, Lumia 625, Lumia 1520 and Lumia 1320.

Lumia devices running on Windows Phone 8 will get an OTA update called the Lumia Cyan, which will integrate Windows Phone 8.1 and brand new Lumia features into one package.

Some of the new features for the Windows Phone 8.1 include camera roll enhancements and Creative Studio, a new and improved Storyteller App for sharing stories as a video slideshow on social networks.