Wowtalk is available for free download for iPhone, Android Mobiles. Wowtalk is a cross platform mobile voip application. iPhone version is available for download now and android version will be activated soon.
When you use WowTalk, your phone calls and text messages to any other WowTalk users are free! Your phone bill will be reduced for sure. When you use WowTalk on a 3G network you might incur operator data charges or internet access fees.
The best thing about Wowtalk and many other similar applications is that you don't need to add contacts in wowtalk. It just uses your address book (already contact list) to check which of your friend is already using wowtalk. When you make call (regular calls), if the person is already using WowTalk then call will be free, otherwise it will be a regular telecom call.
Wowtalk also have this concept of status. Status is like a built-in twitter in WowTalk. You can know your friends real-time conditions by checking his status.
WowTalk Supported devices :
iPhone: WowTalk works iPhone Models: 3G, 3GS and 4, with IOS: 3.0 and newer.
iPod touch and iPad (latest generations) are partially supported.
Android: A version for Android devices is in the works.
With wowtalk, you don’t even need to register! WowTalk uses your phone number as your “identity” and lets you make free WowTalk phone calls to any of your friends that have WowTalk- using THEIR phone number.
Another good thing is that WowTalk is ad free. So if you have an iPhone, then its time to try WowTalk.