Hopefully one day Mozilla will create a search engine for privacy as well. For now, they created Mozilla Firefox Focus, a new browser for your IOS aimed at privacy. Unfortunately this browser is not yet made for Android but not that it would help anyway, Android is a Google operating system so you basically have no privacy anyway. Not that IOS is perfect by the way.
It also offers some functions for Safari which is much needed currently on IOS.
You can check out the page