You can make calls to landlines and mobiles on Viber too, they are cheaper than Skype to landlines but Skype are cheaper to mobiles.
I find Viber better quality these days and don't like the way Skype signs me out automatically on the iPad when I'm browsing, as I miss all my incoming calls if I'm not logged in, whereas Viber is always running in the background to receive incoming calls.
Here are the comparisons for the call rates, you do get even better rates with Skype too if you subscribe.
http://www.techhive.com/article/2071161/viber-launches-viber-out-low-cost-phone-calls-how-do-rates-compare-to-skype.html
Hi ladies
Please can you let me know which apps are best for free / low rate calls over wifi internet to UK landlines and mobiles from my iPhone here in Dubai? Not everyone I need to call is on Skype or vibes so can't make free calls using these
Any tips appreciated!
Thanks