"Koperski was told that Safari content blockers, introduced in iOS 9, will be the only Apple-supported ad blockers going forward, and those ad blockers are limited to use in the Safari web browser."
That doesn't sound good.
I suppose some of those services will just not make any mention of it and make the Adblock toggle server-sided, or only available as an option on a web UI.
Could you use a profile to do the same thing? Like create a "company" that would then use a vpn proxy?