I want to take course in C but C# is available here are they equivalent?
C# and C are not equivalent, C++ is quite similar and better than C, so you should learn C++ instead of C and if you learnt C++ you can also easily code in C as well.
Programming Hub is such an android app but it doesn't have a community like here.
is any app For C language then similar to sololearn
you should take C++...it's the best among C
but I have to learn C