Works flawlessly with iOS 13 beta, 5, 6 , 7, 8. System wide. Incredible, no lag, no big deal, works.
I am also facing this issue please help me resolve itWhat's wrong with AdGuard Pro for iOS? As far as I know it still does system-wide ad blocking. In fact, if I recall correctly the non-Pro AdGuard for iOS is going to gain system-wide adblocking support soon too.