Screen Time Accountability Partner: Setting It Up on iPhone
Letting someone else set your Screen Time passcode works only if the recovery Apple Account is theirs too. How to set it up on iPhone.

Ask people what finally helped them use their phone less, and one answer keeps coming up: someone else sets the Screen Time passcode, usually a partner or a close friend. You don't know the code, so getting more time on Instagram means asking them for it.
Someone on r/nosurf described it this way:
"The one thing that actually worked was the dumbest solution possible. I gave my Screen Time passcode to my roommate." (r/nosurf)
It works for a lot of people. There is also one step in the setup that's easy to get wrong, and if you get it wrong, you can undo the whole arrangement on your own in about a minute.
Why it helps
What makes this work is that turning a limit off now involves another person. You have to ask them, and at 11pm you may not want to explain what you need the phone for. Often that's enough to make you put it down.
One Hacker News commenter set things up so that only their wife knows the unlock password. When they need the browser or Facebook, they ask their wife to unlock it, "often for like 15 minutes" (Hacker News). They still use those apps when they need to; they just have to ask first.
The step people miss: Screen Time Passcode Recovery
When you create a Screen Time passcode, your iPhone asks for an Apple Account to use for Screen Time Passcode Recovery. If the code is ever forgotten, that account can reset it. Apple recommends filling this in.
What matters is whose account you enter. If it's your own Apple Account, you can tap Forgot Passcode?, sign in, and choose a new code without asking anyone. Some people have figured this out:
"I even had a friend set a secret passcode, but I used the 'Forgot Passcode' option to reset it to bypass the restrictions." (r/nosurf)
That leaves two setups that work:
Your partner enters their own Apple Account. They then hold the code and the only way to reset it. Someone on Hacker News gave the same advice years ago: "have them enter their apple id and password. Then you will not be able to reset it with yours." (Hacker News)
You skip recovery. Apple advises against this, because if both of you forget the code, erasing the iPhone is the only sure way to clear it. Only do this if you're both fine with that.
How to set it up
It takes about five minutes, and your partner needs to be there.
Set your limits first. In Settings → Screen Time, set up your Time Allowances and your Screen Time Schedule. (In iOS 27 these replaced App Limits and Downtime. Here's what changed.) Choose them yourself, since you know which apps and which hours are the problem.
Go to Settings → Screen Time → Manage Screen Time → Lock Screen Time Settings.
Give your partner the phone. They type a four-digit code and then type it again to confirm. Don't watch.
On the recovery screen, they sign in with their Apple Account email and password, or you both agree to skip it.
Try it once while they're still with you. Open an app that's over its limit and ask them to unlock it. The first time you ask is the awkward one, so it helps to get it over with when nothing is riding on it.
To change the code later, go to Settings → Screen Time → Manage Screen Time → Change Screen Time Passcode. You'll need your partner for that too.
Things to agree on first
It helps to talk a few things through before you hand the phone over, so that asking for time doesn't start to feel like asking for permission.
How you'll ask. "Can I have 15 minutes?" is easier on both of you than a yes-or-no question. And if they say "after dinner", that counts as an answer.
Exceptions. Travel days, work that happens on your phone, a family emergency. Write down the ones you already know about.
When limits get changed. Pick a regular time, for example Sunday evening, to adjust them together. Otherwise you end up renegotiating a little every night.
What your partner isn't responsible for. They keep the code. They don't need to track your screen time or comment on how you use your phone unless you ask them to.
What it won't stop
Anyone who really wants to can still get out of it. Erase All Content and Settings removes the Screen Time passcode along with everything else on the phone, and there are paid computer programs that advertise removing it. What this setup adds is a delay and another person between you and the off switch. For many people that's enough. There's a longer piece on why no iPhone blocker can be made impossible to turn off: Is there an app blocker that can't be bypassed?
There's a practical downside as well. If your partner is travelling, busy at work, or you've just had an argument, you can't change your limits until they're available. You may want to add that to your list of exceptions.
If there's no one to hold the code
Not everyone has a person they'd want in this role, and some couples would rather keep phones out of the relationship. FlyOut is built for that case: its shields block the apps you choose on a schedule, after a time limit or at a place like your office, and its daily plan helps you decide what to do with that time instead. To get past a shield, you open FlyOut and go through a short breathing exercise that starts by asking why you want your phone right now. It's a pause similar to the one a partner gives you, without having to ask anyone. You can still turn it off if you really want to.
Related reading. If you would rather not involve another person, strict app blocker for iPhone: how strict do you need? compares the other options. For a physical option, there's phone lockbox vs Brick. And if you want to try a shorter experiment together first, a one-week social media break describes what tends to change in seven days.
FlyOut is available on the App Store: calm screen time for iPhone.