VoIP provider Vonage, which announced in September that its application for the App Store had received Apple’s approval, launched apps for the iPhone, the iPod Touch, and BlackBerry devices on Tuesday.

The free-to-download apps unveiled by Vonage have already been made available through the iTunes Store and Vonage’s Mobile Web site. 

While these apps allow Vonage users the facility of unlimited international calling to 60 countries; there is also an international calling plan that entails a $24.99 monthly charge. However, for the current Vonage World customers, the plan involves a saving of $10 when they add Vonage Mobile.

For installation of Vonage Mobile, the ‘Download App’ link on the iPhone, iPod Touch, or BlackBerry pages has to be clicked, and a text message with a link to download the app guides the users through the steps to complete the installation process.

According to Vonage, using the existing cell phone numbers, the iPhone and iPod touch download, customers can make unlimited Vonage Mobile calls in the US over Wi-Fi without consuming cell phone minutes; however, the BlackBerry app uses up phone minutes.

While users can dial directly within the US from the current address book, sans calling cards or PIN codes; in only 15 countries and regions calls can be made to mobile devices, and for the remaining countries, calls have to be made to landline numbers.