What to do when Screen Time limits stop working

You set a limit. It held for a day or two. Now the app opens as if nothing is there, or a grey screen appears and one tap clears it.

Almost every case of Screen Time limits not working falls into one of three groups. Something in Settings is off or missing. Something about Screen Time cannot be changed by any setting. Or the setup is fine, and the person getting past it is you, because you know the passcode. The fix is different for each group.

If you want the machinery first, read how Screen Time app blocking really works on iPhone. This is the troubleshooting half.

Group one: configuration

These are the causes you can fix in Settings in a few minutes. Paths follow Apple’s iPhone User Guide for iOS 26. On iOS 27 the labels have moved, and there is a note on that below.

There is no Screen Time passcode

Apple states the default in one sentence: “By default, Screen Time limits can be ignored once reached.” Without a passcode, a limit is a notice. It tells you the time is up and offers a way to carry on.

Set one. Open Settings, tap Screen Time, scroll down, tap Lock Screen Time Settings, and enter a four-digit passcode twice, as Apple’s passcode guide describes. This is the step most people skip, and every other switch depends on it.

Block at Downtime is off

A passcode by itself changes nothing about the block. It unlocks a second switch. Apple’s guide says that once you set a passcode, “you can choose whether apps are completely blocked or just dimmed during downtime”. Go to Settings, Screen Time, Downtime, and turn on Block at Downtime.

With it off, Apple’s wording is exact: “you see a reminder that it’s downtime, but you can choose to continue using the apps.”

Block at end of limit is off

App Limits have their own version of that switch, inside each individual limit. Apple’s iPhone guide does not name it. The reference is Tech Lockdown’s write-up, updated June 4, 2026, which places it under Screen Time, App Limits, then the limit you want to enforce, as a Block at end of limit option that only appears once a Screen Time passcode exists.

Check each limit separately.

A limit you edited quietly reset

This is why a setup that worked in March fails in April. Tech Lockdown’s page answers the question directly: after changing an App Limit, “you often have to double-check that Block at end of limit is toggled on each time you make a change to either your passcode or the App Limit.”

Every time you touch a limit or the passcode, open the limit again and look at the switch.

Always Allowed wins

Apple describes Always Allowed as apps and contacts “that stay available during downtime and after you reach time limits”. It is an exception list, and it overrides both tools.

Go to Settings, Screen Time, Always Allowed, and move the app out of Allowed Apps. Check it again after an iOS update.

The web version is still open

An App Limit on Instagram says nothing about instagram.com in Safari. Apple’s guide to blocking websites puts it under Settings, Screen Time, Content & Privacy Restrictions, then App Store, Media, Web, & Games, then Web Content. Select Limit Adult Websites, tap Add Website below Never Allow, and enter the address.

That blocks the site all day, not on a schedule. On iOS 27, Apple’s Time Allowances guide adds one narrower case: “If an app has an associated website it declares, the Time Allowance applies to both.” The app has to declare the site.

Downtime and App Limits are different tools

People set one and expect the other. Apple’s guide separates them: Downtime is for “specific times when most apps are unavailable”, and App Limits “Control how much time you spend in apps by setting daily time limits”. A Downtime schedule will not cap an app at twenty minutes, and a twenty-minute App Limit will not keep an app shut after 10 PM.

The limit lives on another device, or does not

Apple’s guide on setting up Screen Time says: “When Share Across Devices is on, any Screen Time limits or schedules you set apply to your iPhone, iPad, and Mac. If you turn off Share Across Devices, each device maintains its own separate Screen Time settings.”

So with sharing off, the limit you set on the iPhone does nothing on the iPad next to the bed. With sharing on, an edit made on the Mac reaches the iPhone, including a switch that may have reverted.

The same guide adds that turning off App & Website Activity “turns off reporting, Downtime, App Limits, and Always Allowed”. If that was switched off, every limit went with it.

Your phone is on iOS 27

Apple has reorganised Screen Time in iOS 27. The current iPhone User Guide describes a Screen Time Schedule made of time windows, Time Allowances for categories such as Entertainment, Games and Social Media, and a Manage Screen Time screen where Lock Screen Time Settings and Share Across Devices now sit.

As read on October 20, 2026, that guide does not mention Block at Downtime, Block at end of limit, or the sentence about limits being ignored. That does not mean the behaviour changed, only that the guide does not say. Read the screen in front of you rather than any article, this one included.

Group two: platform constraints

No setting changes these. They are how Screen Time is built.

Fifteen minutes is the smallest window

Apple’s documentation for the framework behind Screen Time states “The minimum interval length for monitoring device activity is fifteen minutes”, in its entry for the error intervalTooShort. A shorter scheduled window is not something an iPhone app can promise, and the failure is quiet. Lengthen it before you blame anything else.

Ignore Limit is a feature

The option that frustrates people is there by design, and the passcode plus the block switches are the documented way to change it. Tech Lockdown describes what an enforced limit shows instead: one more minute, then the passcode. There is no third state. Either a limit can be ignored, or it asks for a code.

Dimmed is not blocked

A dimmed icon with an hourglass looks like a block. Apple says that look appears when Block at Downtime is on and “restricted apps can’t be opened”. With the switch off, the same dim icon opens after a reminder. If your apps dim and still open, you are back in group one.

Group three: you know the passcode

This is the group nobody wants to be in. The setup is correct. The limit asks for four digits. You type them.

A passcode you chose is a speed bump, and you can cross it. The options are few, and each has a catch.

Have someone else set it

Hand the phone to someone you trust, let them set the four digits, and ask them not to tell you. Apple documents a version of this only for a child under 18 in a Family Sharing group, where a parent sets and changes the passcode from their own device. An adult cannot be made a managed child, so for you this is an arrangement between two people, not a feature.

One implication. Apple’s guide says that after setting a passcode “you can also set up Screen Time Passcode Recovery”, and with it “you can use your Apple Account to reset your Screen Time passcode if you ever forget it.” Your Apple Account is yours, so if Recovery is set up, so is the way back in. If the point is that you cannot reset it, skip Recovery.

Add friction that is not a code

The other answer is a block whose way out is not four digits you memorised. Third-party blockers run on the same Apple framework and do not get a stronger lock: Apple says “The system doesn’t guarantee that the settings you specify govern the device’s behavior”, in its page on the Managed Settings store. What a blocker changes is the shape of the escape hatch.

We make one of these, Habit Hound, so treat this section accordingly. Its lock is tied to your daily habits rather than to a code: the apps you choose stay shut until the habits you listed are marked done, and the block screen lists the habits still between you and the app. The free plan includes three habits and one 15-minute bypass a day. The bypass is counted on a monthly calendar, and Strict Mode, on the paid plan, removes the in-app bypass. None of that makes the block unbypassable. You can still delete the app, and Apple’s framework lets you, because you authorised it yourself.

If what you want is a pause rather than a wall, a different tool fits better. one sec puts a breathing animation in front of the apps you pick and says plainly that it delays access rather than blocking it. For people whose problem is the reflex, not the time, that can be the right amount of friction. A fuller survey is in our comparison of iPhone app blockers.

A five-minute reset

If you would rather not diagnose, do all of this in order.

1. Settings, Screen Time, App & Website Activity. Make sure it is on.
2. Lock Screen Time Settings. Set a passcode, and skip Passcode Recovery if you want it to hold.
3. Downtime. Turn on Block at Downtime.
4. App Limits. Open each limit and turn on Block at end of limit.
5. Always Allowed. Remove the apps you are limiting.
6. Content & Privacy Restrictions, Web Content. Add the web addresses to Never Allow.
7. Share Across Devices. Decide on or off, and check the other devices.
8. Any schedule shorter than fifteen minutes: lengthen it.

If the limit still does not hold, you are in group three. For a bedtime setup specifically, see how to block Instagram and TikTok at night on iPhone.

Questions people ask

Why can I just tap Ignore Limit?

Because that is Apple’s default. Set a Screen Time passcode, then turn on Block at Downtime for schedules and Block at end of limit inside each App Limit. After that, the option becomes a passcode prompt.

My App Limit worked last week and not today. What changed?

Probably an edit. Tech Lockdown reports that Block at end of limit often needs checking again after any change to the limit or the passcode. Open the limit and look at the switch. Then check Always Allowed and App & Website Activity.

Does Screen Time block the website version of an app?

Not by itself. An App Limit covers the app. Websites are blocked separately under Content & Privacy Restrictions, by address, with no schedule. On iOS 27, a Time Allowance covers a website only if the app declares it.

Can I make a Screen Time limit I cannot bypass?

No. You own the phone and you set the passcode. You can make bypassing slower: a passcode someone else holds, no Passcode Recovery, both block switches on, and a third-party blocker whose bypass is counted or removed. Each adds a step between the impulse and the app. None removes it.