Big news for WhatsApp users, on Tuesday WhatsApp updated with free push-to-talk- feature. Using this feature you can record a voice snippet in the app and send it to a contact.
It is like a voice mail service not a two-way conversation. You can send by tapping and holding the microphone icon to record a message, then release to send it. This upadate is available for Android, iPhone, Blackberry, Windows Phone and Nokia.