Developer's DescriptionBy VocalSmartMake free USA/Canada calls on PC and Android devices using Google Voice and IPKALL.vSmart has built-in support for Google Voice and IPKALL: 1. Dial Google Voice and IPKALL directly, no other services needed, simple and easy!2. Make and receive FREE calls from anywhere in the world.3. Turn your home PC into a SIP gateway, make and receive calls from your Android devices.4. Auto NAT/Firewall traversal.