If you've installed a content blocker in Safari and still see ads and trackers firing inside your other apps, that's a scope limitation. Safari content-blocker extensions only operate on what loads inside the browser. Right now, they're scoped to the browser — they weren't built to see traffic from a news app, a game, or a social app running its own network connection outside it.
The scope problem, plainly
Tools like AdGuard's or 1Blocker's Safari content-blocker extensions operate within the browser. That's why the same tracker or ad network that gets blocked on a website in Safari can still show up, unblocked, inside a completely separate app: different app, different connection, outside a browser extension's reach.
This isn't unique to any one blocker extension. Any tool that filters only inside the browser has this same gap. Closing it means filtering at the network level instead — which is also what system-level DNS tools like Pi-hole or NextDNS are built to do, and it's worth noting some browser-extension makers are already exploring OS-level filtering hooks as Apple opens up new system APIs, so the browser-only gap may narrow over time for tools that adopt them.
What closes the gap today: filtering at the network level, not the browser level
Casper's Cloak filters ad and tracker domains at the network level, which means it isn't limited to what a browser renders — it covers the connections made across every app on iPhone, Mac, and Android. The same filtering that blocks a known ad-network domain blocks tracking pixels and analytics beacons regardless of which app triggered the request.
If you already run a self-hosted DNS filter like Pi-hole or NextDNS, you've likely solved the cross-app visibility problem at home already. Where Casper's Cloak adds to that: the same connections are also scored by a machine-learning threat classifier looking for phishing and malware domains that haven't hit a blocklist yet, and the filtering, the classifier, and an encrypted WireGuard tunnel for hostile networks all travel with you across iPhone, Mac, and Android under one subscription — no router config, no DNS profile to maintain on every device separately, and no coverage gap the moment you leave your home network.
Because the filtering blocks connections to ad and tracker domains before they load, pages that are heavy with tracking calls tend to load faster, since the tracking round-trip never happens.
The practical takeaway
If your ad-blocking setup lives entirely in a browser extension, it was built to cover the browser, not your other apps. Closing that gap means adding protection that works at the network level, system-wide, rather than swapping one browser blocker for another.
Casper's Cloak covers this with one subscription across iPhone, Mac, and Android, adding AI-based threat detection and an encrypted tunnel on top of network-level ad and tracker filtering. Plans are at casperscloak.com/subscriptions.