Child keeps turning off Screen Time? 5 fixes that work

You set up limits, they lasted two days, and now everything is switched off again. This is the single most common failure in iPhone parental controls, and it has one cause: Screen Time settings that aren't locked can be changed by anyone holding the phone. Including whoever you were trying to limit.

Updated October 2026

Why your child can switch it off

Screen Time settings that aren't locked can be changed by anyone holding the phone. Every limit, every restriction and every parental-control app built on Apple's Family Controls framework — Reef included — sits behind the same door: Settings › Screen Time. If that door has no lock, nothing behind it holds. The five fixes below close it, roughly in order of how often each one is the actual cause.

Fix 1: Set a Screen Time passcode your child doesn't know

Settings › Screen Time › Lock Screen Time Settings. Choose a four-digit code that is not your device passcode, and that your child has not watched you enter — children are far better at shoulder-surfing than adults expect. iOS will offer to attach an Apple Account for recovery. Accept it. A forgotten Screen Time passcode with no recovery account is one of the more painful things to undo on iOS.

Fix 2: Turn on Block at End of Limit

An app limit without this setting is a suggestion: when time runs out, the child can tap Ignore Limit and carry on. Open each limit in Settings › Screen Time › App Limits and switch on Block at End of Limit, so extending it needs the Screen Time passcode. Do the same for Downtime with Block at Downtime.

Fix 3: Stop passcode and account changes

Settings › Screen Time › Content & Privacy Restrictions › Allowed Changes. Set Passcode Changes and Account Changes to Don't Allow. That stops the device passcode being changed and the Apple Account on the phone being swapped, two routes a determined child uses to get out from under the rules.

Fix 4: If it's their own iPhone, manage it from yours

For a child with their own device, set Screen Time up through Family Sharing from your iPhone rather than on theirs: Settings › Screen Time on your phone, then your child's name. You set the limits and the Screen Time passcode from your device, so the controls aren't sitting on the phone they hold, and Ask to Buy and limit requests come to you.

Fix 5: Trim what stays reachable

Settings › Screen Time › Always Allowed lists the apps that stay open no matter what any restriction says. Messages and FaceTime are in there by default. Remove them if you don't want them reachable during a locked session. Phone cannot be removed, deliberately, so emergency calls always work. This list explains a lot of confused reports that a lock 'didn't work'.

Why this affects third-party apps too

Every parental-control app on iPhone, including Reef, is built on Apple's Family Controls framework — the same machinery behind Screen Time. That means the shielding is enforced by the system rather than by an app that can be swiped away. But a child who can reach Settings › Screen Time can revoke the app's authorisation and switch the whole thing off. No third-party app can prevent that, because Settings itself can't be shielded. The Screen Time passcode in Fix 1 is what closes the door.

If you've forgotten your Screen Time passcode

If you attached an Apple Account when you set it, tap Forgot Passcode on the entry screen and recover it there. If you didn't, there is no supported reset — the only route is erasing the device and setting it up as new, which is exactly as unpleasant as it sounds. Don't set a code you won't remember, and do attach the recovery account.

Match the tool to the age

For a teenager with their own iPhone, Screen Time with a locked passcode is the right structure — it's built for budgets and schedules on a device they own. For a younger child using your phone, a session-based allow-list is a better fit: it starts in one tap, shields everything you didn't choose, and ends with your Face ID. Reef takes the second shape, and it deliberately never paywalls the lock, the PIN or the passcode recovery.

iOS behaviour described here was checked against iOS 26. Apple moves settings between releases — if a path doesn't match what you see, the feature is usually still there under a nearby name.