After adding Appirater to my iOS project, when I compile, I get the error:
Undefined symbols for architecture i386:
"_OBJC_CLASS_$_Appirater", referenced from:
objc-class-ref in AppDelegate.o
ld: symbol(s) not found for architecture i386
clang: error: linker command failed with exit code 1 (use -v to see invocation)
After searching and searching on the internet, none of the solutions found helped.
Both my project and target are setup as:

What should I try more?
I think, that you only added files to project, but not to target.
Click on
Appirater.mfile inProject Navigatorand set checkbox near to your target name inTarget membershipofFile Inspector.