Actually Windows Phone has Instagram now. Snapchat, I'm not sure (and really don't care). Windows Phone has all the apps most people need. Teenage girls couldn't live with it since it doesn't get a lot of the trend apps like Candy Crush Saga, Snapchat, etc., and of course there are some people who absolutely need a certain app that's only on Android iOS, but that's pretty rare.
Anyways, something that bothers me is that Apple is stuck on contracts. All the iPhones cost a fortune off contract (including the 5C, even though it's a lower end phone). Wait until 2016, Apple is going to be selling their phones off contract for a decent price and market it as revolutionary (even though it's going to be 2 years after every other company did it

).