Filter-list updates depend on app releases.
New or changed ad domains may remain outside the list until a later release.
Evidence source ↗K
Ka-Block!
Ka-Block! is a free, open-source Safari content blocker for Apple devices. It uses a curated list of advertising and tracking domains.
Editorial overview
Aggregated Overview
The product offers focused Safari domain blocking, is free and open source, and publishes a no-network filtering design. Its narrow scope and last listed version update in 2021 limit confidence about current maintenance and coverage.
This profile combines documented product information and independent evidence where available. It is not a hands-on test unless TechZella explicitly identifies one.
Ka-Block! Decision Snapshot
A quick way to understand who this product may suit, where its limits matter, and which facts are most relevant before you compare alternatives.
Best suited to
Apple-device users seeking a free, open-source Safari blocker with a curated domain list and a design that does not make network connections while filtering.
Look elsewhere if
Users needing broader browser coverage, extensive custom controls, or frequently refreshed filter lists. The published release history shows version 3.5 dated November 6, 2021, and should evaluate alternatives such as 1Blocker or AdGuard for Safari instead.
Platforms
iOS, iPadOS, macOS, Safari
TechZella assessment
6.7/10
Overview
Ka-Block! is a free, open-source content blocker for Safari on Apple devices. It blocks requests to selected advertising and tracking domains using a curated filter list.
Its approach is intentionally limited: Safari applies the supplied rules, while the project says its filter code does not connect to a server or access loaded webpages. The project also says list updates arrive with new app releases, so coverage depends on published updates.
Ka-Block! — What Sets It Apart?
These are the product-specific differences that may matter when deciding whether the software fits your workflow. They are based on documented evidence rather than a universal ranking.
- The filtering extension supplies Safari with blocked-domain rules; the project says its filter code makes no network connections and does not access loaded pages.
- The project says its blocked-domain list changes only when a new app version is released.
7 key claims verifiedOur editorial team checked this profile against vendor documentation. Supported by 3 documented sources.
Ka-Block! Pros & Cons
Pros
- Free on the listed iOS and Mac App Stores.
- Open-source code is released under the MIT license.
- The project says its filtering code makes no network connections and does not access loaded pages.
- Available for Safari on iPhone, iPad, and Mac.
Cons
- The project acknowledges that some ads may pass through.
- The blocked-domain list is updated through app releases.
- The latest version shown in Apple's version history is dated November 6, 2021.
- The product is limited to Safari in its published materials.
Ka-Block! Gotchas & Operational Limits
These are documented constraints or practical friction points that may matter before you adopt the product.
Safari content blocking must be enabled in Safari settings.
Installing the app alone may not activate blocking if the browser setting remains off.
Evidence source ↗Ka-Block! Pricing & Plans
Free
$0
The iOS and Mac App Store listings show Ka-Block! as free. No paid plans are listed.
Check current pricing →Pricing may change. Verify current plans on the vendor's website.
Ka-Block! Competitors & Alternatives
Compare similar products directly, then see which alternatives may make more sense when your requirements differ.
Direct competitors
These products address broadly similar requirements. The descriptions focus on documented reasons a buyer might compare them with Ka-Block!.
Ka-Block! Features
Blocking
- Curated filter list for selected advertising and tracking domains
- Safari content-blocking rules
- List updates distributed with app releases
Privacy and licensing
- Project says filtering code makes no network connections
- Project says the extension does not access loaded webpages
- MIT-licensed open-source code
Ka-Block! Specifications
| Browser | Safari |
|---|---|
| Platforms | macOS, iOS, iPadOS |
| Minimum macOS version | macOS 10.13 or later |
| Minimum iPhone OS version | iOS 12.0 or later |
| Minimum iPad OS version | iPadOS 12.0 or later |
| License | MIT |
| API | No public API documented |
| Integrations | No third-party integrations documented |
| Free trial | Not listed; the apps are free |
| Latest version shown in App Store history | 3.5, dated November 6, 2021 |
Deployment & System Footprint
Verified installation, hosting, administration, or environment details that can affect implementation.
| Installation | Available as a Mac App Store app and an iOS App Store app; the extension works with Safari. Source ↗ |
|---|---|
| Minimum listed operating systems | macOS 10.13 or later; iOS 12.0 or later for iPhone and iPadOS 12.0 or later for iPad. Source ↗ |
Our evidence-based assessment
TechZella Score
A proprietary editorial score based on product capabilities, usability, value, performance, support and user sentiment evidence.
6.7/10Moderate confidence
The product offers focused Safari domain blocking, is free and open source, and publishes a no-network filtering design. Its narrow scope and last listed version update in 2021 limit confidence about current maintenance and coverage.
Methodology v1.0. The assessment weighs feature coverage (25%), ease of use (15%), value for money (20%), performance (15%), support (10%) and user sentiment (15%), using researched product evidence and verified review evidence where available. It is a TechZella editorial assessment, not a direct user-review average.
Editorial transparency
Our Review Methodology
Key claims are linked to the sources used to verify them. This evidence record is separate from third-party user ratings.
TechZella evaluates software using documented product capabilities, pricing information, usability and value considerations, independent user evidence where available, and competitive context. The assessment is an editorial review, not a hands-on test unless one is explicitly identified. Our editorial assessment is based on 3 documented sources.
What TechZella adds
- The filtering extension supplies Safari with blocked-domain rules; the project says its filter code makes no network connections and does not access loaded pages.
- The project says its blocked-domain list changes only when a new app version is released.
Important limitations
- The project describes its filtering scope as modest and acknowledges that some ads can get through.
- The latest version shown in the App Store history is 3.5, dated November 6, 2021.
Evidence-backed claimsKa-Block! is a Safari content blocker for Apple platforms. The project publishes its source under the MIT license. The project says its filtering code makes no network connections and does not access pages loaded in Safari. The iOS App Store lists the app as free and shows 4.2 from 217 ratings. The Mac App Store lists Ka-Block! as free and requires macOS 10.13 or later. The latest version displayed in Apple's version history is 3.5, dated November 6, 2021. Apple's iOS listing says the developer reports that the app collects no data.
The project repository identifies it as a Safari extension and links to Mac and iOS App Store downloads.
View source ↗Verified 2026-10-05The repository identifies the project license as MIT.
View source ↗Verified 2026-10-05The repository describes the extension's filtering behavior and its division of work with Safari.
View source ↗Verified 2026-10-05Apple's US listing displays the price and rating aggregate.
View source ↗Verified 2026-10-05Apple's Mac listing displays the price and compatibility requirements.
View source ↗Verified 2026-10-05The Mac App Store version history lists version 3.5 and its date.
View source ↗Verified 2026-10-05Apple displays the developer's privacy disclosure and notes that the information has not been verified by Apple.
View source ↗Verified 2026-10-05Community feedback
Reviews
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FAQ
Is Ka-Block! free?
Yes. Apple’s iOS and Mac App Store listings show it as free.
Which platforms does it support?
Apple lists versions for iPhone and iPad, and a separate Mac version. The product works with Safari.
Does Ka-Block! offer a public API or integrations?
No public API or third-party integrations are documented in the reviewed product materials.
Is there a free trial?
A trial is not listed. The app itself is listed as free.
How does it update its filter list?
The project says the blocked-domain list is updated through releases of the extension.
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