De-Ad uses Safari's native Content Blocker API. Rules are provided to Safari itself, which applies them before pages load. The app never sees which websites you visit—it's impossible by design.
No. It often speeds up browsing. Ads and trackers are blocked before download, reducing data usage. Blocking is performed by Safari's optimized native engine.
Curated from trusted open-source blocklists like EasyList and EasyPrivacy—the standard for web ad blocking. All rules are publicly auditable on GitHub.