We need an iphone app that allows users who have installed that app on the phone to call one another at no cost for incoming and outgoing calls between the callers. It shall be free totally for many hours as they talk non-stop, even if they are located from different countries.
Also, we need to add a chat panel to allow users to turn on chat panel to type chat messages to one another via the phone. We can provide the graphics where you need.
Just left (at most) 2 details:
A log panel to show the call activity with other users by date and time (descending order) to show latest first.
A loud ringtone when another user calls in. We can provide the ringtone ( if you need), for you to incorporate in.
And we need the developer to complete the SIP setup on our dedicated server for us, and to also submit the app to Apple Store to get the Application listed successfully in the Apple store, to complete the project successfully.