This is a FREE sip based VOIP dialer which works on iPhone and iPad devices . This Application allows user to connect to a SIP server and make VOIP calls .
No need to enter SIP server ip and other details from every device you use .

some of the features are :

Cloud based SIP clients management portal .
Optimised for Low bandwidth Internet connection.
Text Chat and Video support .
Outgoing number manipulation .
Optional VPN Tunnel support.
Web Portal for remote provisioning of accounts and manage settings
Auto login with QR code/Bar code scan