Blog · Comparisons · 11 min

The best app blocker for iPhone, judged on one thing: what it costs to get back in

There is no universal best app blocker for iPhone. There is a best one for how easily you cave. So this comparison ranks everything — the free iOS tools, ScreenZen, one sec, Opal, AppBlock, Forest, Brick, Unpluq, Blok, Bloom, Foqos, timer boxes and Monk — on the one number that predicts whether you will still be using it in March: how long it takes you to get back into the app you blocked.

Almost every ranking you will find is written by a company selling one of the entries, ours included, and almost none measure the thing that decides whether a blocker survives a bad Tuesday night. Feature lists don't predict that. What does is the cost of the u-turn: the seconds, taps and steps between wanting the app back and having it. Prices below were checked on each maker's own site in August 2026, and where a company publishes no figure, we say so rather than invent one.

Why "how hard is it to undo" beats every other criterion

Because you will try to undo it. Everyone does. The blocker that works is the one that is still standing at the moment you want it gone.

Put every option on one scale. At one end, the block you can lift in two taps without leaving the sofa. At the other, a phone locked in a box on a timer. Everything else sits in between, and where it sits has nothing to do with quality — a beautifully built app with an off switch in Settings is still a ten-second block.

So the useful question is not "which is best" but "how much friction do I need?" Someone who sees a limit warning and closes the app needs almost none. Someone who has tapped "ignore for today" every night for four months needs the key in another room. Buying less friction than you need feels worse than buying too much, because you end up concluding you are the problem when you just bought the wrong tool.

What kinds of app blocker exist for iPhone?

Four families: the free tools built into iOS, software blockers you install, physical NFC blockers, and timer boxes.

The first two are software: the barrier lives inside the same iPhone that tempts you. The last two are physical: the key leaves the device. That sounds like a technical detail and it is the whole argument. When the weak moment arrives, who decides — you, with your thumb, or an object in the hallway? Reports, streaks and design are downstream of that.

Are the free iPhone tools enough?

For measuring your use and catching mild drift, yes. Not when the problem is that you are the one approving the exception — the skip button is always one tap away.

Screen Time is already installed: it shows how long you spend in each app and lets you set daily limits. Focus modes silence notifications by time block. Both are free and both deserve a try before you spend anything, if only because they tell you what you are dealing with.

Their ceiling is well known: when the limit fires, iOS offers to ignore it for the rest of the day. That is not a bug — Apple built it as a reminder, not a wall. If you are the kind of person who sees the warning and closes the app, stop reading, you already have your blocker. If you have spent months tapping through it at midnight, more software of the same shape will not fix it. We picked that apart method by method in why Screen Time doesn't actually stop you.

One free option deserves more credit than the paid lists give it. ScreenZen is completely free and donation-supported, with no premium tier, and it runs on iPhone, Mac, Windows and Android. It puts a pause and a prompt in front of the app, caps daily opens, and tracks streaks. On mechanism it does roughly what several paid subscriptions do. If your problem is drift rather than compulsion, it may be the last thing you install.

Which paid app works best: Opal, one sec, AppBlock or Forest?

They are good at different jobs and they share one ceiling: every one of them can be switched off from the iPhone it is running on. All four are worth taking seriously.

one sec does not block, it interrupts. Before the chosen app opens it makes you sit through a few seconds of breathing, or rotate the phone, or type something out, and in that gap you often decide not to bother. It is also the option with the most serious evidence behind it: their site cites multiple peer-reviewed studies run with the Max Planck Institute and Heidelberg University, including one published in PNAS in 2023, and reports 57% fewer app openings on average. They do not publish individual pricing on their site — only team licences, from 83 cents per user per month billed annually — so check the App Store listing for the current personal price. Cost to get back in: a few seconds of patience.

Opal is the most ambitious of the four: focus sessions, reports, difficulty modes, a score with history, and a genuinely good interface. It is also the most expensive: their pricing page lists a free plan, $19.99 a month, $99.99 a year, or $399 once for lifetime, across iOS, Android and Mac. We wrote it up in our Opal review. Cost to get back in: seconds to a couple of minutes, depending on the mode you picked while feeling ambitious.

AppBlock is the practical veteran: schedule-based blocking, profiles, and an Android version alongside the iPhone one. If your household runs on both platforms, it is the comfortable choice. Its premium price is set in the App Store and changes by region, so take the number from there rather than from us.

Forest is playing a different game entirely: motivation. You plant a virtual tree and it dies if you leave the session. For studying in blocks it works surprisingly well. As a wall, it never claimed to be one — the tree dies and you carry on, which for some people is enough. Check the App Store for the current Plus price.

The ceiling every piece of software shares: the key is inside the cell

A barrier you can switch off from the device that tempts you is not a barrier. It is a well-designed suggestion.

This is not a quality problem with Opal or one sec. It is a limit of the category. It does not matter how strict the session is if the switch is in Settings, ten seconds from your thumb, at the hour when your capacity to resist is lowest. At half eleven, tired, the part of you that wants forty minutes of reels negotiates better than the part that installed the app. That is not weakness. The phone was designed by people who are very good at this, and blocking software is playing the away leg.

Which is why people who have already paid for one or two of these subscriptions tend to end up searching for the same thing: something they cannot switch off themselves.

Physical blockers: when the key is in another room

An NFC object keeps the key outside the phone. The blocked app will not open until you scan the thing, so laziness finally starts working in your favour instead of against you.

Five routes worth knowing, and one of them costs nothing.

Foqos is free, open source under the MIT licence, and describes itself as a free alternative to Brick, Unpluq, Blok and Opal. It blocks through Apple's Screen Time API and starts or ends a session when you scan any NFC tag — generic multipacks cost a few euros. So the cheapest way to buy the strongest mechanism in this article is roughly the price of a coffee, and we would rather say that than pretend otherwise. The catch is narrow but real: no support desk beyond a GitHub repository, no warranty, and optional manual and QR modes that leave the system only as strict as you are honest.

Brick is the category leader in the US with a large community behind it. It is $59 on their site, one payment, with the line "No subscriptions, ever", the iOS and Android app included, and five emergency unlocks in the app if you lose the device. Their homepage does not spell out shipping countries or duties, so confirm both at checkout if you are outside the US. Full breakdown in our Brick review.

Unpluq was among the first in Europe. The tag is $30, and Premium is required for the tag and app to work, sold in three, six or twelve-month terms, with a 30-day money-back guarantee and support for iPhone from iOS 16 and Android. They advertise that users reduce screen time by 1h 20m a day — their own figure, from their own site. The trade-off is structural: the barrier exists for as long as you keep paying for it.

Blok and Bloom shrink the key to a card. The Blok Card is $29 on their site (the keychain and magnet versions were sold out when we checked). Bloom's app is free on the App Store, rated 4.8 from 3.1K ratings, and unlocks by scanning an NFC keycard whose price is not published on that listing. A card in your wallet keeps the system working outside the house, at the cost of the key never being more than three seconds away. That is the right trade for a commuter and the wrong one for someone whose problem is the sofa.

Monk is ours: an NFC disc the size of an AirTag, magnetic, no battery, €54.95 paid once (€89 for two, €119 for three), no subscription, app and updates included, 30 days to send it back. It sits at the strict end of the mechanism scale — to reopen a blocked app you scan the disc, every time, and there is no soft unlock inside the app: no “just for today” button, no code to type. Three emergency unlocks do exist inside the app, and they run out, which is the point. Around that: Block and Allow modes, Strict Mode, scheduled sessions, and remote scan for a child's phone. It needs an iPhone on iOS 16.2 or later, and there is no Android version.

And to be clear rather than salesy: there is no 100% unbreakable block on iOS — not with Brick, not with Unpluq, not with Monk. A browser or a determined workaround always exists. What a physical barrier buys you that software cannot is that cheating has to become deliberate and slow. Autopilot does not survive a walk down the hallway.

What about timer boxes?

They lock the whole phone away for however long you set. Honest and blunt: they cannot tell the difference between Instagram and your mother calling.

A timer box does exactly what it promises, and prices vary enough between brands and sizes that the figure should come from the seller. The problem is aim. Into the box go the maps, the two-factor code for work, the payment app and the phone as a phone. For a dinner or an afternoon of studying, fine. As a daily system, blocking four apps and leaving the rest of the device alive is a finer instrument.

The comparison table: what each one costs you to get back in

Figures checked on each maker's own site in August 2026; App Store prices change by region, which is why we point you there instead of quoting them. If the payment model is what you are weighing, the full sum is in subscription versus one payment.

Verdict: the best app blocker for iPhone, by case

• You just want to know how much you use your phone: Screen Time. Free, already installed, and it will tell you whether you need anything else.
• You want friction and you don't want to pay: ScreenZen. Free, donation-supported, and on mechanism it holds its own against several paid subscriptions.
• You want the strongest mechanism for nothing: Foqos plus a few euros of NFC tags. It beats us on price and it is not close. You are trading money for being your own support desk.
• A pause is all you need to change your mind: one sec. It also has the most serious research behind it of anything here.
• You want the most complete software and the bill doesn't bother you: Opal, knowing it is $99.99 a year or $399 once.
• There's an iPhone and an Android in the house: AppBlock for software, Brick or Unpluq if you want the physical version to cover both.
• You are out all day and won't carry an object: stay with software, or use a card. A disc on the fridge does nothing for you in an airport, and this is the case where Monk is the wrong purchase.
• You want the key in your wallet: Blok or Bloom.
• You want the whole phone gone for a few hours: a timer box. Nothing software-based competes with a closed lid.
• Your first criterion is "I must not be able to undo it": a physical barrier, no argument. Within that: Brick if you want the biggest community and an Android app in the box; Unpluq if a family plan and multiple unlock methods matter more than owning it; Monk if you want one payment in euros and the strictest mechanism, where scanning is the only way back in.

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