Is Screen Time really blocking sites on your iPhone?

A free check in about 30 seconds. Nothing to install, and nothing about you is stored.

1. Add one test address

On your iPhone, go to Settings → Screen Time → Content & Privacy Restrictions → App Store, Media, Web & Games → Web Content. Choose Limit Adult Websites. Under Never Allow, tap Add Website and type:

check.seq.today

It's an empty page we run only for this test. Blocking it changes nothing else.

2. Come back here and check

Open this page in the browser you want to test (Safari, Chrome, or any other), then tap the button.

What the result means

On: your iPhone's web filter is active in this browser. Sites on your Never Allow list don't load here, and Apple's adult-site filter is on.
Off: the test page loaded, so the filter isn't active in this browser. Check that Limit Adult Websites is chosen and the address is on Never Allow, or that Screen Time is on at all.
Couldn't check: the page couldn't reach us (no signal, a VPN, or a content blocker). Try again on a normal connection.

What this check can't tell you

It tests the browser you're in, now. Apps with their own browser (inside X, Reddit, Instagram and others) are a separate door.
It can't see who knows your Screen Time passcode. If you set it yourself, you can switch the filter off in a weak moment, and Apple's "Forgot Passcode?" lets the Apple ID owner reset it.
Apple's adult filter misses new and small sites. It slows you down. It doesn't trap you.

We hold the key. You set the wait.Sequoia keeps your Screen Time code for you and gives it back after the wait you chose, never at night. $29.99 for 90 days, nothing renews.