What does Limit Adult Websites block on iPhone?

Written by the developer of The Blocker. Facts checked 21 October 2026 against Apple’s support pages, and Apple’s wording is quoted. Apple uses slightly different names on iOS 26, iOS 27 and the Mac, so each name is given where Apple uses it.

What Apple says it does

Apple describes the filter in a few short lines:

• It “limits access to many adult websites automatically” (Apple Platform Deployment).
• It allows “access to all websites except detected adult websites” (Apple’s family guide).
• Apple says the built-in filter suits “simple or limited content-filtering needs” (Apple).
• For a Child Account under 18 it is on by default (Apple). By default a child can still reach certain wellness and safety websites, which a parent can block in Safari.

That is all Apple publishes. It doesn’t share the list of sites or explain how a site gets “detected”. A 2018 9to5Mac how-to described the filter as checking pages as they load (9to5Mac), but Apple hasn’t documented that, and it is an old article.

Where to find it. On iOS 26, for your own iPhone: Settings › Screen Time › Content & Privacy Restrictions › App Store, Media, Web, & Games › Web Content (Apple). For a child on iOS 27 with Apple’s new parental controls: Settings › Family › your child’s name › Apps & Websites › Restrictions › Filtering, below Websites (Apple).

The three Web Content choices

The names in the table are from Apple’s family guide for version 27, with the Mac names in brackets from Apple’s Mac guide. Apple’s iOS 26 iPhone guide names only Limit Adult Websites and the Never Allow list, and The Blocker’s in-app setup calls the first choice Unrestricted. So check the exact words on your screen.

Limit Adult Websites vs Allowed Websites Only

They work in opposite directions:

• Limit Adult Websites is a block list. Everything opens except what Apple’s filter detects as adult and what you put on Never Allow.
• Approved (Allowed) Websites Only is an allow list. Nothing opens except the sites you add. Apple’s Mac guide says, “Only allowed websites can be accessed,” and it starts with a list of default allowed websites (Apple).

On iOS 27, Apple ties Approved Websites Only to Ask to Browse: “To use Ask to Browse, just set to Approved Websites Only.” Your child asks for a new site and you approve or decline it, “from your own device or your child’s device” (Apple).

For an adult, an allow list usually blocks too much for daily life, from banks to news. Limit Adult Websites, plus your own lists and the layers below, is the practical choice.

Always Allow and Never Allow

When you choose Limit Adult Websites, you get two lists of your own:

• Never Allow blocks sites the filter misses. Apple’s steps: select Limit Adult Websites, then “tap Add Website below Never Allow, and enter the URLs of the websites you want to block” (Apple).
• Always Allow lets a site through that the filter blocks by mistake. Owners of normal websites have reported that their pages were blocked; a July 2026 post quotes the page Safari showed: “Website Not Allowed” (Apple Developer Forums).

On the Mac, the same idea is the Allowed and Restricted lists under Customize (Apple). If a Screen Time passcode is set, changing either list needs it (Apple).

What it does not do

• It doesn’t catch every adult site. Apple says “many”. When one gets through, add it to Never Allow. See Limit Adult Websites not working.
• Apple doesn’t say which other browsers follow it. For its new Ask to Browse feature, Apple says “Safari and other supported browser apps”, without a list (Apple). Test any browser you keep.
• It doesn’t filter posts, photos or videos inside apps. It is a website filter. Apple’s Communication Safety is a separate feature for photos and videos in messages and FaceTime calls (Apple).
• It doesn’t block apps. Blocking apps is a different part of Screen Time.
• It sends no reports. Apple describes no reports or alerts about what it blocks.
• It doesn’t lock itself. Without a Screen Time passcode, anyone holding the phone can switch it off. With one, whoever knows or can reset the passcode can. See Limit Adult Websites bypasses.

Where The Blocker fits

The Blocker is a separate app that works alongside Apple’s setting:

• Free, in Safari: an Adult category that blocks sites whose names contain any of 161 keywords, a different method from Apple’s, plus up to 10 sites of your own and its own Always Allow list. It works in Safari and Safari views.
• Pro, Strong protection: it uses Apple’s Screen Time to apply Apple’s same adult filter plus up to 50 of your own blocked sites in every browser and in links you open inside apps like Instagram or X. It adds Can’t delete The Blocker, Blocked apps and a one-hour Hard moment. Because the adult filter is Apple’s, it won’t catch a site Apple misses. Read more about Strong protection.

The Blocker sends no reports, and anyone with the Screen Time passcode can undo it too. For all the free options side by side, see free ways to block porn on iPhone; for a child, see blocking porn on a child’s iPhone.

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