Zoiper is an easy to use sip video softphone, with excellent voice quality and easy to setup.
Requires iOS 5.1.1 or later. Compatible with iPhone, iPad, and iPod touch. This app is optimized for iPhone 5, iPhone 6, and iPhone 6 Plus.
Configuration instructions for Android, Windows Phone 8 and iOS for iPhone, iPAD
Languages: English, Arabic, French, Italian, Portuguese, Spanish