Does most iPhone apps support web services?

Question

Do most of the popular iPhone apps that communicate with the back-end server communicate via web services? I assumed that is so.

Some applications that I think of will be: Facebook, Bloomberg, NY Times, ESPN, etc.

Answer 1

Most of the applications I wrote use some web services, I prefer RESTful, but I was forced to use SOAP.

Answer 2

Well, a web service is just an application programming API

, , , API , , , "". API XML, JSON .. . . :

REST
SOAP
JSON