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Ka-Block!

Ka-Block! is a free Safari content blocker for a curated selection of advertisements and trackers.

Place
#3 of 11
Score
6.5

What Ka-Block! is

Ka-Block! is a free Safari content blocker for a curated selection of advertisements and trackers. Its maker says blocking third-party scripts can reduce page loading time, data use, and battery drain. The project aims to block most ads and trackers without slowing pages, while noting that some ads may still get through. Its filtering code is described as making zero network connections, and the extension does not access pages loaded by the browser. Apple’s listing reports the developer’s disclosure that the app does not collect data. Ka-Block! is released under the MIT license and is available as an extension and for iOS and macOS. The project says its blocked-domain list changes only when a new extension version is released; users can submit a pull request with an ad-serving domain and a site where it appears. The App Store version history lists version 3.5 dated November 6, 2021. The iOS listing requires iOS 12.0 or later, and the iPad listing requires iPadOS 12.0 or later.

Good

  • Free Safari content blocker for iOS and macOS
  • Filtering code makes no network connections
  • Extension does not access loaded pages
  • Released under the MIT license

Watch out

  • Some ads may still get through
  • Custom filter lists are not supported
  • Blocked-domain list updates require a new extension version
  • Listed version 3.5 dates to November 6, 2021

Who it suits

It suits Safari users who want a curated ad and tracker blocker on iOS or macOS. It may be less suitable if you need custom filter lists or frequent filter updates.

Verdict

Ka-Block! offers a focused Safari blocking option with a stated no-data-collection disclosure. Its fixed curated list and version-based updates are worth weighing if you want to adjust filters yourself.

Plans and prices

From Ka-Block!'s own pricing page, checked 21 Sep 2026.

All about pricing
PlanPriceWhat it gives you
FreeFreeSafari content blocking · Curated filter list · Open source
Ka-Block!FreeSafari content blocker · iOS and macOS

The facts

Each one read from Ka-Block!'s own pages, with the date it was checked.

What it does

Age compatibility
The iOS listing requires iOS 12.0 or later, and the iPad listing requires iPadOS 12.0 or later.checked 8 Oct 2026
Custom filter lists
Nochecked 21 Sep 2026
Filter list
The App Store description calls its filter list fast and curated.checked 8 Oct 2026
Filter updates
The project says the blocked-domain list can only be updated by releasing a new version of the extension.checked 8 Oct 2026
Latest listed version
The App Store version history lists version 3.5, dated November 6, 2021.checked 8 Oct 2026
Open source
The project is released under the MIT license.checked 8 Oct 2026
Privacy
The project says its filtering code makes zero network connections and the extension does not access pages loaded by the browser.checked 8 Oct 2026
Privacy disclosure
Apple’s listing reports the developer’s disclosure that the app does not collect data.checked 8 Oct 2026
Product
Ka-Block! is a Safari browser extension that blocks a curated selection of advertisements and trackers.checked 8 Oct 2026
Purpose
The maker says blocking third-party scripts can reduce page load time, data use, and battery drain.checked 8 Oct 2026
Support
The project invites users to submit a pull request with an ad-serving domain and a site where its ads appear.checked 8 Oct 2026

Where it runs

Browser support
single-browserchecked 21 Sep 2026
Device coverage
desktop-and-mobilechecked 21 Sep 2026
Filtering approach
The project aims to block most ads and trackers without slowing pages, and acknowledges that some ads may get through.checked 8 Oct 2026
Platforms
The project lists installation through the Mac App Store and the iOS App Store.checked 8 Oct 2026

Money

Free plan
Yeschecked 21 Sep 2026

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