BlackBerry is making its OTT messaging service, BBM, available on iOS and Android this summer.
As it stands, BBM has 51m daily active users, who use the service once every 90 minutes on average, and adding two extra platforms has to potential to cause an explosion in usage. However, following WhatsApps huge success on Android and iOS, it might have come to the party too late. 
The BBM app will be free to download, and its unclear at this point how BlackBerry intends to monetise the service – possibly through a regular subscription, or advertising – or whether the move isnt intended to boost revenues at all. BBM could potentially act as a virtual brand ambassador for the OS, but there is also the risk that it could lose its central USP, especially among the youth market.
