Vonage has released a Mobile App for the BlackBerry and iPhone that offers discounted rates on international phone calls via their VoIP service. The App is available on the iPhone, iPod Touch, and BlackBerry.

The Vonage Mobile app for BlackBerry works over your carrier's voice network and not over WiFI. The iPod touch app only works over WiFi.

The Vonage app is pay-as-you-go and will not give free global calling to those who subscribe to Vonage's $25 per month Vonage World plan, although this feature could be coming later this year.

iPhone users can visit the iTunes App Store while BlackBerry users can point their BB Browsers to www.vonagemobile.com/blackberry for the app.