Facebook today released an update to its standalone Facebook Messenger app for both iOS (App Store link) and Android OS (Google Play link). The update adds the ability for users to send voice messages to their friends as an alternative to the traditional text message. In addition, Facebook has begun testing with users in Canada a feature that would allow users to make a Voice over IP (VoIP) call to other users. The social network has yet to announce when this feature will be rolled out globally.