Viber for iOS has been updated to version 4.2 with a new design for iOS 7, and some new features.
As well as a new look, Viber now lets you send mulitple photos and videos at the same time, bringing it in line with WhatsApp. The length of video messages you can send has also been increased. More interestingly, you can now block any number or contact in Viber.
Viber is a free app that allows you to text, call and send photo/video messaged free on WiFi or mobile networks. Like Skype you can also buy credit to call non-Viber numbers, with the recently added ‘Viber Out’ feature.