Facebook today announced it has launched a new desktop app for its Messenger service through its Newsroom web site.
It also explains the reason why the Facebook mobile app was launched.

Individuals, as never before, use creativity to stay in touch with the people they care for, despite being completely disconnected from them. We've seen over 100 per cent of people's desktop browsing on audio and video for Messenger over the past month. Actually the best messaging platform with applications for Mac OS and Windows, including unrestricted and free video gathering calls.

The app is now available for download through Microsoft Store and the Mac App Store, making video calls simple for large screen users.