Viber for iPhone
is an easy-to-use application that lets you make phone and video calls for free using WiFi. You can chat one-on-one with friends and family as well as take part in conference calls. Viber's messaging feature includes image sending capabilities as well as a large emoji and sticker library to make your conversations more exciting. To be sure of the security of your conversations, Viber lets you manage your contact list, and the app automatically encrypts all of your messages.
Viber for iPhone is also available on Blackberry
, and Mac