System-wide URL filtering for iOS 26 — powered by Apple's Private Information Retrieval. We never see the URLs you visit.
Remove ads across Safari and every app on your device.
Prevent cross-site tracking and fingerprinting.
Protection from known malicious domains.
Block adult and explicit content domains.
Phosphor uses Apple's Private Information Retrieval (PIR) with homomorphic encryption. Your device checks URLs locally using a Bloom filter. For potential matches, encrypted queries go through Apple's relay — we can't see what you're browsing.
Zero telemetry. No analytics SDKs. No crash reporters. Nothing phones home.
A compact data structure instantly checks if a URL might be blocked. ~99.9% of URLs are cleared here with zero network traffic.
For potential matches, the system sends a homomorphically encrypted query. The server processes it without ever decrypting it.
Queries route through Apple's relay. Your IP is hidden from our server; query content is hidden from Apple. Neither sees both.
The encrypted response is decrypted on your device. The app never learns which URL was checked.
7-day free trial
or $249.99/year (save ~30%)