i use adblock[0], which while generically named, works phenomenally well. it's a pay app, which is a turnoff for some people, but well worth two dollars to me and is under active development. it uses a local vpn with host based filtering to adblock domains on all apps. the same developer also has a safari plugin adblocker, ADmosphere[1], which is free. alternately, or concurrently, if you prefer safari plugin adblockers, mozilla has one called focus[2], which they've recently expanded into an ephemeral browser that you can easily clear all local data on to avoid tracking. it's handy for one-off searches you don't necessarily want added to tracking network profiles of yourself.

[0] https://itunes.apple.com/us/app/adblock/id691121579?mt=8

[1] https://itunes.apple.com/us/app/admosphere-free-ad-blocker/i...

[2] https://itunes.apple.com/us/app/firefox-focus-privacy-browse...