Truphone is a VoIP app that routes calls across the Internet to save users money. Like Skype, calls to other Truphone users are free and calls to other users around the world are available for a low price.

The app is available for free on the App Store for the iPhone and the iPod touch. Truphone issued a statement saying, “We are aware of this issue and indeed already have a solution (Truphone 3.03), with Apple for approval. We had hoped that our new version would be approved and available at the same time as the Apple 3.1 firmware. We are, of course, working with Apple to ensure a speedy release of this update.”

Currently works in 33 countries around the world, Truphone uses the iPhone’s own address book. Making a Truphone call is easy: just open the Truphone application and dial as normal. 

Truphone’s Skype feature for iPhone follows the release of similar services (client-based applications like fring and Nimbuzz, or web application like IM+ for Skype).

Anyone has tried of these applications? Which one do you like best?

[via GigaOM]