Oh no, that's not what I mean. However the idea is not bad. It won't allow you block all ads, but at least it's enough to block most popular ad networks and trackers. You know, we may use it in the very first version just to release it sooner.
But again, ideally I'd like it to use a different method (from what i've read - it is possible). AG for Android has a real VPN server inside the app. So it can get a web request and block it or modify response stripping ads from it (just like AG for Mac or Windows do with a network driver).
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Experience shows that I am very bad with giving ETA on anything. Precision is plus or minus one year.
I used to have a Nexus 6P and used Adguard on that and it worked incredibly well so anything approaching that on iOS would be superb however there was an app called 'Been Choice' I believe but it was removed and I think this did the exact same thing as Adguard for Android (citing security reasons but it was probably more because it blocked ads system wide)