Hello,
We are development partner with Twilio and working with them since last 4 year. We build following applications/modules for different clients.
1) Appointment Reminder/Reschedule SMS base application
2) Calling hub , between provider and end customer
3) Accept credit card payment using IVR
4) Online Singing competition application submission using Phone
Any many lots more.
In short we can do anything with Twilio ,you just name it or imagine and will do that for you.
Our price structure is very much flexible and we will offer you best price after knowing your exact requirements.
Regards,
AIT