Viber is useful to send individual message from any place in world. You can also send video call and voice message using it. You can also easily send free call to another Viber user using his or her Viber number.
Viber for desktop is designed for desktop users to communicate to their friends and family member easily. You can get notification of messages from desktop. It stores all your addresses, contacts and email in apps memory.
Note: You need to install Viber in your Android phone before using it.