When Facebook took the unusual step of launching a completely new app for its messaging service, many raised eyebrows. Why not just use the Facebook app? Facebook Messenger is just another way to get to your Facebook Inbox, isn't it?
Now, just a day after its release, that same pointless app is sitting comfortably at the number one position of the App Store's Top Free chart. Maybe it isn't such a silly idea after all, and here's why...