BlackBerry Messenger (BBM) is a proprietary mobile instant messaging app and service developed by BlackBerry Limited (formerly Research In Motion). The app allows users to send messages, files, images, and audio and video recordings to other users in real-time. BBM also allows users to create group chats and share their location. Users can also share their BBM contacts with friends, family, and colleagues. BBM is available on BlackBerry, Android, and iOS devices.
Discontinued Will be completely closed in March 2019. See message at https://allo.google.com/