Pryglass shows what the website you're on does in Safari: which other companies it contacts, what it stores and whether it seems to fingerprint your browser.
Open Pryglass on a page to see its trust score from 0 to 100 and the main factors behind it, in plain words. Then act on it: block every tracker the page contacted with one tap, or block a single domain from the event that shows it.
Pryglass works on your device. No account, no analytics, and it sends nothing about your browsing to anyone. One purchase for iPhone, iPad and Mac.
PROTECTION IN ONE TAP
• Block every tracker on this page: one confirmation blocks all the ad, analytics and session-recording domains the page contacted, on this site only. Undo is right there if something breaks.
• Block from the event: tap a third-party tracker to see what was seen, then block it on this site or on all sites.
• Protection: one switch turns the known ad, analytics and session-recording domains into block rules on every site. A rule never applies on the blocked company's own site. Pause it on one site, or turn it off and keep the blocks you chose yourself.
• Safari applies the blocks with declarativeNetRequest, so requests should stop before they load.
WHAT PRYGLASS LOOKS FOR
• Third parties: other companies' domains the page contacts, with request counts. More than 100 known ad, analytics and session-recording domains are named by company.
• Storage: cookies, local storage, IndexedDB and cache use, with known tracking IDs flagged. Only key names are recorded, never values.
• Fingerprinting: canvas, WebGL, audio and font checks that can help recognize a browser without cookies.
• Sensitive features: location, camera, microphone, screen sharing, clipboard reads, notifications and push.
• Session recording: requests to known services that can capture clicks, scrolling and typing.
• Your own form use, for context, such as focusing a password field. Pryglass never reads what you type.
MAKING SENSE OF IT
• Trust score: higher means fewer concerns. It's a guide, not a verdict.
• Three levels for events: High sensitivity, Noteworthy and Routine.
• Tap an event to see what was seen, how sure Pryglass is and what you can do.
• Insights: top trackers, third parties, what changed since your last visit, and a 7-day view.
CHANGES OVER TIME
Pryglass saves a visit only when you open it on a page, and only on this device. Private tabs are never saved.
• Compare with your previous visit, highest-scoring visit or 7-day average.
• Alerts when a page has more high-sensitivity events, newly uses session recording or makes several more third-party requests, or when its score drops well below its 7-day average.
• Watch sites you care about: when you open Pryglass on one, it sums up what changed since your last visit. Nothing is checked in the background.
• After 5 saved visits to a page, Pryglass flags unusual visits using simple statistics.
• Weekly proof in More: domains blocked and sites checked this week.
PRIVATE BY DESIGN
• No network requests of its own, no server, no account.
• Private Browsing tabs, if you allow Pryglass there, are analyzed live and never saved.
• Saved history keeps no query strings and is deleted after 90 days. Delete it any time in More > Your data.
• Block rules and saved history stay on this device. Nothing is sent anywhere.
FOR DEVELOPERS
• Filter, search, copy request URLs and see script locations when Safari provides them. On Mac, Pause on next stops Web Inspector at the next matching call.
• Copy a readable summary, or the raw data as JSON, from More > This page.
Requires iOS/iPadOS 18.4 or later, or macOS 13 or later with Safari 18.4 or later.
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