An iPhone is a different problem than a shared iPad, and it's worth saying why before getting into settings: it's the phone your child actually carries, it almost always has its own cellular data plan, and it leaves your house every single day. A router-level block -- a real option worth knowing about for a Wi-Fi-only iPad -- barely slows down a phone that can just switch to cellular the moment it's out of range. Everything that actually works here has to live on the device itself.
That's what Screen Time and Content & Privacy Restrictions are for, and iOS gives you real, complete-feeling tools: app limits, an age-rating restriction that blocks the app outright, deleting it with a reinstall lock, and a Safari-side website block. We'll go through all four, then get into exactly what none of them reach -- because a phone that travels with your child has more ways around a device setting than a tablet that mostly stays on your own Wi-Fi.
How to block YouTube on an iPhone
Set a Screen Time app limit or a scheduled Downtime
Since this phone is almost certainly tied to your child's own Apple ID under Family Sharing, you'll usually set this from your own device rather than theirs.
- On your phone, open Settings > Screen Time, tap your child's name under Family.
- Tap App Limits > Add Limit, select YouTube (and YouTube Kids if it's installed), and set the daily limit -- as low as one minute functions as a near-total block.
- Turn on Block at End of Limit.
- Separately, consider Downtime instead of, or alongside, an app limit: it blocks all apps outside an allowed list during hours you set (overnight, school hours), and unlike a daily-minutes limit, it doesn't reset itself as soon as midnight passes on a day your child is home sick or it's a weekend you'd rather it stayed off longer.
This is the fastest thing to set and the easiest to adjust, but like any Screen Time restriction it lives behind a passcode -- one your child may already know if it's ever been typed in front of them.
Restrict by App Store content rating
The same trick that works on an iPad works here, and it's worth using for the same reason: it blocks the app from launching at all, not just from being downloaded again.
- Go to Settings > Screen Time > Content & Privacy Restrictions (on your own device, managing your child's account), and turn it on.
- Tap Content Restrictions > Apps.
- Set the allowed rating below 17+ -- YouTube's App Store listing is rated 17+, so any ceiling below that hides the icon and blocks it from opening, installed or not.
This one setting also covers whatever else gets installed later at a rating above your chosen ceiling, which matters more on a phone a teenager is actively downloading things to than it does on a shared family iPad.
Delete the app, and close the reinstall gap
- Long-press the YouTube icon, tap Remove App > Delete App.
- Go to Settings > Screen Time > Content & Privacy Restrictions > iTunes & App Store Purchases, and set Installing Apps to Don't Allow.
Do both, in that order or either order, but do both: on a phone with its own data plan, a reinstall doesn't need your Wi-Fi at all, so skipping the install restriction leaves the door open in a way that's easy to miss until it's already happened.
Block youtube.com in Safari
- Go to Settings > Screen Time > Content & Privacy Restrictions > Content Restrictions > Web Content.
- Choose Limit Adult Websites, then under Never Allow, add
youtube.com,m.youtube.com, andyoutu.be. - Or choose Allowed Websites Only to list just the sites you want reachable, full stop.
Unlike a router-level rule, this restriction travels with the phone across Wi-Fi and cellular alike, since it's enforced on the device rather than the network -- one real advantage a phone-side setting has over anything you'd configure at home. It only covers Safari, though; a separately installed browser may need its own restriction or its own check.
What none of this stops
Every setting above genuinely works. None of them add up to a phone your child can't reach YouTube on under any circumstance, and it's worth being specific about where the gaps are rather than assuming they're not there.
- A browser you haven't restricted. If a different browser gets installed, or was already there before you set any of this up, it may reach youtube.com on its own.
- Someone else's phone. A friend, at school, after the last bell -- nothing about your child's Screen Time settings applies to a device that isn't theirs.
- A shared or overheard passcode. The whole structure above rests on a Screen Time passcode your child doesn't know. Type it in front of them once, and it's not secret anymore.
- A link, not a search. A shared video link routes straight to the content the same way it always did; none of the restrictions above interrupt a direct link the way they might slow down browsing or searching.
- Growing older, and the age ceiling with it. An App Store rating restriction only holds until you raise it -- or until your teenager makes the case that they're old enough now, which for most families arrives well before you'd chosen.
None of that is a reason to skip these settings. It's a reason to expect them to be a real, meaningful barrier, and not the same thing as YouTube simply not being reachable.
The better fix: control what plays, not whether the phone can reach it
Every setting above works the same way: make the app or the site harder to get to. That's a genuinely different problem from blocking a YouTube channel, but it has the same shape underneath -- you're trying to remove YouTube because you can't control what happens once your child is inside it, and every lock you put on the door has a way around it, because none of them touch what YouTube shows once it's open.
The alternative isn't a tighter restriction. It's an app with nothing in it to discover -- no autoplay, no recommendation feed, no search bar -- just the specific videos a parent already picked, on a phone your child still gets to have. If Shorts are the actual thing you're trying to get away from rather than YouTube as a whole, blocking YouTube Shorts covers what YouTube's own controls do and don't do about that specifically.
See how ChannelKeep works if giving your child something built around a shorter list, instead of a phone with fewer doors, sounds like the better trade.
Frequently asked questions
Does blocking YouTube at my home router work on my child's iPhone?
Only while it's on your home Wi-Fi. Almost every iPhone has a cellular data plan, so the moment it steps off your network -- at school, a friend's house, walking down the street -- a router-level block does nothing at all. Device-side Screen Time settings are the only lever that travels with the phone.
What's the single most effective built-in setting for blocking YouTube on an iPhone?
Restricting the App Store content rating below 17+ in Content & Privacy Restrictions. YouTube's own listing is rated 17+, so lowering the ceiling hides the app and stops it from launching -- not just from being newly downloaded -- in one setting rather than several.
If I delete the YouTube app, can my child just reinstall it over cellular data?
Yes, and cellular makes this easier to miss, since a reinstall doesn't need your home Wi-Fi at all. Set Installing Apps to Don't Allow under Content & Privacy Restrictions after deleting the app, or the app store install restriction is the only thing actually stopping a re-download.
Does blocking youtube.com in Safari stop it everywhere on the iPhone?
It stops it in Safari specifically, on any network the phone is connected to, Wi-Fi or cellular. A separately installed browser may not inherit the same block automatically, so it's worth restricting new browser installs too, or checking that browser's own settings.
Can Screen Time restrictions on an iPhone be scheduled around school hours?
Yes, through Downtime, set separately from App Limits -- it blocks all apps outside an allowed list during set hours regardless of what network the phone is on, which is often more useful for a phone that leaves the house every day than a fixed daily time limit.
What can a determined teenager still do even with all of this set up?
Reach youtube.com through an unrestricted browser, ask a friend to look something up and share it, watch on someone else's phone, or in some cases guess or learn a shared Screen Time passcode. None of the iPhone-side settings reach past the device itself.