How to find hidden files and extensions? I believe someone ugh!! Is tracking and listening in on my iPhone 6s!!

And there is one bright spot. The Wikileaks CIA disclosures did indicate that iOS devices were significantly more difficult to break into, and Apple (apparently having read those) indicated that most of the attack pathways had already been neutralized with if you have a non-jailbroken iGadget with the latest iOS version in it.

If your phone is not jailbroken it has no hidden files and extensions and no one is spying on you. If it IS jailbroken that's your problem to solve.