Limited deal from US Black Friday/Cyber Monday which is still active in the US time zone.
One of the best ad blockers for a non rooted phone on android. Blocks both browser apps from chrome and also within apps to essentially give an ad free premium app experience.
Also works on iOS and doesn't require jailbreak.
Download the app from here and use my link to purchase the licence: https://adguard.com/en/welcome.html
Lifetime Licence is usually $13.30 for mobile devices but if you pay via Russian rubles as the nominated currency and with the 50% Black Friday deal, it's only ~$3.60 with a 28 degrees Mastercard via PayPal.
The lifetime licence enables in app ad blocking as well as in the browser of your choice (I use chrome developer). The free version only does in browser blocking. Works a lot better than other free alternatives like Block This which I would have to constantly toggle to allow playstore updates etc.
This is because BlockThis does not actually filter anything. It replaces the DNS server with their own and redirects ad domains to localhost.
Adguard intercepts all outgoing web requests, and can block requests for individual files. This lets adguard block ads even if they originate from the same server as content you do want to see.
As an addition, Adguard may also work on a DNS level if "Filter DNS requests" option is enabled. But instead of using some remote DNS server, it intercepts DNS requests locally.
Works very well on my unrooted S7 edge on the Nougat beta. Improves browsing experience and saves mobile data. Has had neglible effect on battery life so far. According to in app statistics, in one day I've blocked 5028 ad requests and saved 128mb of data.
Deal probably expires soon when it hits Tuesday US time.