Viber is a cross-platform instant messaging and VoIP tool that allows users to send free messages and make free calls to other Viber users, on any device and network, in any country. If a user has Viber on multiple platforms, such as phone and desktop, Viber automatically sync messages, calls and files across all devices.
Features of Viber
Viber enables HD voice calls, video calls, free text and picture sharing to other Viber users and group conversations. Contacts are added automatically by Viber. Contacts and messages sync between a user’s mobile and Windows desktop, allowing many features such as transferring ongoing calls between devices.