Filtr: The First Ad Blocker That Works in Every iPhone and Mac App, Not Just Safari

Because URL Filters work at the full-URL level, not just the hostname, Filtr can be much more precise than a DNS blocker. It can allow the main content from example.com while blocking example.com/tracker.js, for instance. And at no point does Filtr see your data. It only ever sees the URL your device wants to load, which it checks against its local blocklist and then immediately discards .

This architecture also means Filtr plays nicely with other network services. You can run it alongside a VPN, iCloud Private Relay, or a custom DNS profile without any conflict . The blocklist itself is curated and updated automatically by Calderolla—you never need to configure rules yourself .

Pricing and setup

Getting Filtr running takes two purchases, both one-time with no subscription:

• Wipr 2 is a universal purchase for $4.99 that covers your iPhone, iPad, Mac, and Apple Vision Pro .
• Filtr unlocks as an in-app purchase for a reported $3.99 (exact prices vary by region), with no ongoing fees .

Total cost to get system-wide ad blocking across all your Apple devices: about nine dollars, once. Setup is straightforward: update Wipr 2 to version 2.30 or later, purchase the Filtr unlock inside the app, and enable it in your device's Settings . The operating system requirement is strict—you must be running iOS 26, iPadOS 26, or macOS 26, because URL Filters are not available on earlier versions .

What Filtr can and can't block

Filtr blocks ads, trackers, pop-ups, and EU cookie consent notices across your entire device—native apps, third-party browsers like Chrome and Firefox, and even background requests from apps you're not actively using . For anyone who has ever opened a weather app and been greeted by a flashing banner ad, the effect is immediately noticeable .

But there is a structural limitation that no URL-based blocker can solve: first-party ad serving. When a platform like Facebook, Google, or Reddit serves ads directly from its own domain (the same domain that delivers your friend's posts or your search results), the URL looks identical to legitimate content. Filtr cannot distinguish between a feed post and an ad if both come from facebook.com .

This means you'll still see sponsored posts in the Facebook and Instagram apps, promoted search results on Google, and advertisements inside Reddit's native app. It is not a flaw in Filtr—it's an inherent constraint of URL-level filtering. Calderolla and other developers describe it as a known limitation of the URL Filters approach .

Other boundaries worth noting:

• No data collection. Filtr never sees, stores, or transmits your browsing history, network traffic, or personal information. Its deny-list model processes all decisions on-device and then discards the request data .
• No custom blocklists. Users cannot add their own filters or edit the blocklist. Everything is managed by the developer .
• Apple-only. Filtr supports iPhone, iPad, and Mac, but not Windows, Android, or other platforms, because URL Filters are an Apple-specific API .
• Not a VPN. Filtr does not encrypt your traffic or change your IP address. It is a content filter, not a privacy tunnel .

What a security editor's experience revealed

Zack Whittaker, the security editor at TechCrunch, has used Wipr as his primary Safari ad blocker for years and also runs a Pi-hole ad blocker on his home network. He tested Filtr after its release and documented his experience .

After installing Filtr, he reported that ads disappeared from multiple apps almost instantly—including his iPhone's built-in Weather app and a third-party news app. The effect, he wrote, was "immediately noticeable" and the setup was straightforward. He updated Wipr 2, completed the in-app purchase, and enabled Filtr in his device settings without any complications.

Whittaker was clear-eyed about the first-party ad limitation, noting that sponsored content inside Facebook, Google, and Reddit apps still appeared. But he framed this as a technical constraint of how URL Filters work, not a failing of Filtr itself. His overall verdict was positive: he called the tool "a meaningful step forward for privacy on Apple devices" and recommended it for anyone already comfortable using ad blockers .

The broader significance is that Filtr is the first consumer-facing app to ship with Apple's URL Filters technology, and it demonstrates what a privacy-first, on-device filtering architecture can look like when it's not constrained to a single browser . For a decade, the best you could do on an iPhone was block ads in Safari and tolerate them everywhere else. Filtr shows that Apple's platform can now support something better.