Questions about what programming Languages to learn for specific types of apps

I was hoping to develop apple and android apps. I hope to develop education apps and maybe games. Google says Objective C is the best language to code ios apps in but C++ is metaphorically described as an automatic car, I assume it means that it really is Objective C with functions already built for developers to use. I know Python is written in C but whats is designed for, what learn python over one of the Cs? Again, I intend to write scientific apps as practice for gaming apps. Is there any reason to learn Python and one of the Cs? Im thinking C++ is the best option but im not really sure, I assume if you know C++ you know Object oriented C.