A: AdGuard reverts to the free version (basic browser protection only). You keep your settings but lose system-wide blocking.
The choice is obvious.
A: If you bought a subscription, yes—it expires after 1 or 2 years. If you bought a Lifetime license , it never expires.
A: Yes, but iOS restrictions mean it blocks ads via a local VPN (not system-wide). It still works for Safari and in-app ads.