If you've gone looking for a way to use your phone less, you've probably run into the same problem 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 has the most polished design of the group. It blocks distracting apps on a schedule, gives you "focus sessions," and wraps the whole thing in nice charts and a sense of progress. Internally, it uses the same iOS Screen Time framework Apple gives every developer, so it is 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 automatic opening rather than a deliberate binge. Watch out for: it only adds friction; it does not block anything outright. 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 oldest of the group, and it's cross-platform: it blocks sites and apps across your phone, laptop, and tablet at the same time. That's its real strength: if you get distracted on a laptop as much as on your 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)
The paid apps don't advertise this, but most of what they do is built on top of Screen Time, which is already in your Settings 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 same core weakness as all the others.
The weakness every one of them shares
Opal, one sec, Freedom, and Screen Time all share the same weakness: you control the off switch. Every limit can be ended, ignored, or uninstalled by you, and you are always there at the moment of temptation.
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. At 11pm you are tired and impulsive, and in that state you will disable the block 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." The blocking is fine. The problem is that the person the block is supposed to stop can always turn it off.
The fix: take away your own off switch
What makes any of these tools hold is removing your ability to disable them 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 fails the moment you are willing to type four digits you have memorised.
WaitToUnlock addresses this, 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. At the moment of temptation there is no instant override, no session to end, and no passcode to type. By the time you could get in, the urge has passed.
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. Whichever you pick, what decides whether it works is whether you can still switch it off in a weak moment. Make the passcode unavailable to yourself, and any of these tools will hold.