Best in-app ad blocker
This app is worth every penny. Ive been using it for years and Im always SHOCKED at the amount of ads when I use someone elses phone. It blocks almost all ads to the point where its few and far between when one gets missed. Please note this will NOT block "Facebook Ads" which are typically sponsored posts. If it did you wouldnt see anything on Facebook, Twitter, etc. What is does eliminate are the data and speed hogging ads, especially video ones, on websites and in most apps. My only feedback is that it typically doesnt pick up hyper-local display ads on some blogs local to my area. But of course you can just add them to the ad blocker on your own.
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AdBlock - block ads on iPhone, v2.8.0