There are a number of VoIP applications for the iOS and Android platforms now that you really don’t want one another service. But netTalk, whose apps for the mobile platform were only recently released, comes with a number of other features that really makes it an interesting service that you should check out.
As the title suggests, netTalk lets users make free VoIP calls to their friends and family. The free service is restricted to contacts inside USA and Canada though. These calls can be made either via 3G, EDGE or Wi-Fi networks. In addition to free VoIP calls, the netTalk app also includes support for conference calling, the ability to record conversations as well as contact import from the smartphone to the app. This will serve as a good way to backup your contacts in case you happen to lose them.
The team is already reported to be working on a future version that will include support for low-rate international calling and the ability to link to a netTalk DUO number that can be connected to a computer.