Featured app for iPhone
MobileVOIP - Cheap calls3.0.18
Cheap national and international phone calling app
MobileVOIP offers cheap national and international phone calls via a
The app itself looks quite slick but the problem is you have to go to each network provider's site to view their calling rates - there's no convenient comparison table.
Some users also report that both call quality and stability isn't great so our advice is, stick to Skype if you can.