If you've gone looking for a way to use your phone less, you've probably hit the same wall everyone does: there are dozens of apps that all claim to fix it, most of them want a subscription, and it's genuinely hard to tell whether any of them do something your phone can't already do for free. This is an honest attempt to sort that out.
We'll look at the three most popular blockers, Opal, one sec, and Freedom, then at Apple's built-in Screen Time, and then at the thing none of them quite solve.
Opal
Opal is the slickest of the bunch. It blocks distracting apps on a schedule, gives you "focus sessions," and wraps the whole thing in nice charts and a sense of progress. Under the hood, it uses the same iOS Screen Time framework Apple gives every developer, it's a polished interface on top of the system you already own.
Good for: people who'll actually open an app to start a focus session and like seeing stats. Watch out for: the price (it pushes a premium subscription that runs to the tune of tens of pounds a year), and that its strictest "deep focus" lockdowns can still be ended if you're determined enough.
one sec
one sec does something narrower and clever. Instead of blocking an app outright, it intercepts the moment you open it and makes you take a breath, literally a short pause and an animation, before it lets you through. The idea is to break the automatic, unconscious tap that opens Instagram forty times a day.
Good for: mindless habitual opening, where the problem is autopilot rather than a deliberate binge. Watch out for: it relies on friction, not a hard wall. When you genuinely want in, you breathe and you're through. For some people that pause is enough; for others it becomes just another thing to tap past.
Freedom
Freedom is the veteran, and it's cross-platform, it'll block sites and apps across your phone, laptop, and tablet at the same time. That's its real strength: if your distraction lives on a browser as much as a phone, Freedom covers all of it from one schedule.
Good for: people who need to block across multiple devices, especially a work laptop. Watch out for: the subscription, and that on iPhone specifically it leans on the same underlying limits as everything else, so the phone-only experience isn't dramatically different from Screen Time.
Apple Screen Time (free, already installed)
Here's the part the paid apps don't advertise: most of what they do is built on top of Screen Time, which is sitting in your Settings right now at no cost. You can schedule Downtime, set per-app daily limits, block entire categories, and restrict adult websites, all natively.
Good for: basically everyone, as a starting point. There's no reason to pay before you've tried the free thing the paid things are built on. Watch out for: the interface is plainer, there are no motivational charts, and, crucially, it has the exact same fatal flaw as all the others.
The weakness every one of them shares
Opal, one sec, Freedom, and Screen Time all have the same hole in the bottom of the boat: you control the off switch. Every limit can be ended, ignored, or uninstalled by the one person guaranteed to be present at the exact moment of temptation, which is you.
On Screen Time you tap "Ignore Limit" and enter your passcode. On the paid apps you end the session, or delete the app, or just dig into settings until the block goes away. It takes seconds. And the version of you who hits that off switch at 11pm is tired, impulsive, and will happily trade tomorrow for the next scroll. The block isn't beaten by a clever workaround; it's beaten by you, on purpose, because in that moment you want it gone.
This is why so many people churn through three or four of these apps and conclude that "nothing works." It's not that the blocking is weak. It's that the off switch is always in reach of the person it's supposed to stop.
The fix: take away your own off switch
The single thing that turns any of these tools from a gentle nudge into something that actually holds is removing your ability to disable it on impulse. On iPhone, that comes down to the Screen Time passcode. If you set the passcode yourself, you know it, and you'll use it the second you want to bypass a limit. The lock is only as strong as your willingness to not type four digits you have memorised.
This is the gap WaitToUnlock fills, and it works with Screen Time rather than replacing it. It generates a random Screen Time passcode, walks you through entering it on your phone without ever letting you memorise it, then stores it encrypted. Now every limit you've set, in Screen Time or layered under Opal or Freedom, sits behind a code you genuinely don't know.
If you ever truly need it back, you can request it, but it's only revealed after a wait of several hours. So at the moment of temptation there's no instant override, no session to end, no passcode to tap. By the time you could get in, the urge has passed, which was the entire point.
So which should you use?
Start with Screen Time, it's free and does 90% of what the paid apps do. Add Opal if you want nicer stats and focus sessions, one sec if your problem is mindless opening, or Freedom if you need to block across a laptop too. But whichever you pick, the thing that decides whether it works isn't the app. It's whether you can still switch it off when it counts. Lock the passcode away from yourself, and any of these tools finally gets to do its job.