What's the difference between C and Objective-C?

Answer 1

The main different between the two is that Objective-C is object-oriented​, and C isn't. While this is the case, C++ and Objective-C may both be object-oriented, but with a handful of difference.

http://stackoverflow.com/questions/2445050/how-different-is-objective-c-from-c

Answer 2

Basically Objetive-C allows you to develop IOS applications. And C, is focused on procedures, e.g. unix / linux OS is made in C.