WhatsApp has launched WhatsApp app for BlackBerry 10.
Main features:
Instant push notifications to alert you when you receive messages.
Full integration into BlackBerry Contacts, with automatic contact scanning.
Send Video, Images, and Voice notes to your friends and contacts.
It will save your messages offline and will retrieve them when network coverage is restored or device is turned back on.
Contact Blocking
Share location
Custom notification sounds
Email chat history
Broadcast messages to many contacts