Do porn blockers work?

By Luke, founder of Bramble · his story · how this was written · October 22, 2026

Yes, at one thing. A blocker puts time and steps between you and porn at the hour you are weakest, and that friction is worth having. No, at the thing most men want from one: stopping for good. No app, including Bramble, which I make, has published evidence that it frees a man on its own. A blocker changes what you can reach. It does not change why you reach.

I have used most of the well-known blockers, and for twenty-eight years, from ten to thirty-eight, I was the man they are built for. So I have every reason to tell you they work, and some reason to know where they stop.

What a blocker is good at

Most nights, watching porn does not begin as a decision. It begins as a restless evening and a phone that is already in your hand. A blocker’s whole job is to put something between that hand and porn: a page that will not load, an app that opens empty, one more step where there used to be none.

That is worth more than it sounds. An urge tends to rise, peak and fall rather than climb forever, and the practice of letting one pass without acting on it has a name, urge surfing. A delay is what gives it room to fall. A door that opens the moment you pull on it never does.

The best numbers in favor of blockers come from Ever Accountable, which makes a blocker and accountability software and says on the page that it has a financial interest in the result. It surveyed its own customers about a month after they started. Of 391 people using its blocker, 79.5% reported watching less often than before, and 18.7% said they had stopped. Asked to recall how often they had watched before, those who said daily or more fell from 54% to 15%.

Take those for what they are: a company’s survey of its own customers, a month in, self-reported, with no comparison group. The company publishes the survey’s totals for anyone to check, which is more than most do. Even so, a survey like this cannot separate the blocker from the decision to install one, or from a bad stretch ending on its own. A second survey on the same page, of its accountability customers and run years earlier, puts that product well ahead of its blocker, so I would not lean on that either. Read that way, the numbers still point one direction: in the first month, a blocker seems to help. How much, and for how long, no study I could find has measured.

A blocker buys time. That is all it was ever going to buy, and at eleven at night it is a great deal.

What the research has actually tested

Here are the studies that come closest to the question, and what each can and can’t tell you. There are not many, and that is the finding.

Each row’s source is listed at the foot of the page. The two 2018 Oxford rows are two separate surveys reported in one paper.

Read down the last column and the pattern is plain. No one I could find has tested whether a man who puts a blocker on his own phone is freer a year later. The closest anyone has come is parents filtering their teenagers, which found little or no effect, and one company’s survey of its own customers, which found a large drop and had nothing to compare it with. The handful of randomized trials of online help for problem porn use tested programs and exercises, not blockers.

A blocker works on access. The reason is somewhere else.

Researchers in Hungary asked more than a thousand adults why they watch porn, then looked at which reasons went with problematic use. Sexual pleasure was by far the most common reason people gave, and it was only weakly linked to problems. The reason most strongly linked was relieving stress, followed by getting away from bad feelings, with boredom further behind (Bőthe and colleagues, 2021).

A larger study pooled 74 surveys of more than 112,000 people in 16 countries. Only some of those surveys asked why people watch, but in them the same two came out among the five strongest predictors of problematic use: using porn to avoid bad feelings and using it to relieve stress (Bőthe and colleagues, 2024). These are survey links, not proof of cause, and the samples were not all men. But they fit what men say about themselves.

In a study of 229 men who had sought help or wanted it, each man rated how sure he was that he could avoid porn in 18 situations. The situations sorted into three groups: arousal, boredom and opportunity; intoxication, certain places and easy access; and feeling stressed, sad or upset with a partner (Kraus and colleagues, 2017). Look at that list. Easy access is on it, and a blocker reaches it. Stress, sadness and being upset with someone you love are on it too, and a blocker reaches none of them.

Put plainly: most men think they have a porn problem. Many of us had a pain problem, and porn was the fastest thing we ever found for it. A blocker shuts one door. The pain is still in the room, and it goes looking for another. That is why a blocker can hold for a few weeks and then stop holding. Nothing broke. Nothing had changed about what porn was doing for the man behind it.

If you want to look at what it has been doing for you, why can’t I stop watching porn? is the longer answer, and why do I watch porn when I’m bored? has a short tool for finding your own trigger.

The off switch is the whole question

Every blocker has an off switch, and the man who installs it and the man who reaches for it are the same man in two different states. The first is calm, at two in the afternoon, sure of what he wants. The second is tired, at eleven at night, and wants it off.

Psychologists have a name for the distance between them. George Loewenstein called it the hot–cold empathy gap, and his summary of the research is simple: in a calm state, people tend to underestimate how much a strong urge will change what they want and what they do (Loewenstein, 2005).

The best-known test with sexual arousal is small. Twenty-four young men at Berkeley answered the same private, hypothetical questions once while aroused and once while not, and their answers moved a long way (Ariely and Loewenstein, 2006). Two lab experiments in Germany, with about 170 students between them, women as well as men, found that arousal raised people’s stated willingness to take sexual risks but not other kinds (Imhoff and Schmidt, 2014). A 2021 attempt in Texas did not find the same effect from watching an explicit film (Crosby and colleagues), so the record is mixed. None of these watched anyone switch off a blocker. They measured answers, not behavior. But they describe an evening most men will recognize.

The plainest numbers come from a study that has nothing to do with porn. In 2020, about 1,900 American adults with Android phones took part in an experiment, and six in ten of them were given a tool to set daily limits on their most tempting apps, social media and web browsers among them. A change to a limit took effect only the next day, so no one could loosen today’s. When a limit ran out, most people could snooze it, often after a short wait. The limits worked: the people who had them spent about 22 minutes a day less on those apps than the people who didn’t. But the limits they had set would have cut more than twice that, and the gap was mostly the snoozing (Allcott, Gentzkow and Song, 2022).

That is the off switch, measured. People will choose a limit in advance; economists call it a commitment device. Then, at the moment it matters, when people can lift a limit themselves, they often do. The economists who study these devices add a warning that fits every blocker I know: people who underestimate their own temptation can choose a restriction too weak to hold (Bryan, Karlan and Nelson, 2010). In one savings experiment in the Philippines, people set their own penalty for breaking their plan, and 55 percent broke it; the likeliest reason, the author concluded, was that the penalties they chose were too small to hold (John, 2020).

The question was never how strong the lock is. It is who holds the key.

Give the switch to someone else

I found no study, for porn or for phones, that compares a lock a man holds himself with one someone else holds. So this part is reasoned, not measured. But everything above points one way. If the switch is in your pocket, the man at eleven at night gets the final say. If someone else holds it, he doesn’t get to decide alone, and he can’t decide in silence.

The nearest thing to evidence is what people in recovery say stops them. In a 2026 study of twelve-step groups in Spain, what people said stopped them in the moment was knowing they would have to tell someone: “Knowing I would have to report it at the next meeting was enough to make me stop and think” (Lorente-Corral and colleagues). One man in those forum journals put the other half plainly. He could get around his blocker, he wrote, “but it still serves as a reminder.” A reminder is worth having. It is not a person.

Giving the switch away is simple to do and hard to want. On an iPhone it usually means asking someone you trust to set your Screen Time passcode, one you never see. Is there a porn blocker that can’t be bypassed? goes into why that matters more than any feature, and the Keyholder guide walks through the setup, screen by screen.

Here is exactly what Bramble does at the off switch, so you can weigh it rather than take my word. In Bramble, turning protection off is not instant. It is a wait: thirty minutes if you ask during the day, three hours if you ask in the early evening, and if you ask after nine at night, until six the next morning, or later if you have set a night curfew. If you have a Keyholder, someone who sat with you and set your iPhone’s Screen Time passcode, one you never see, they hear the moment you ask. They are told, not asked. Because they hold that passcode, deleting the app runs through them.

None of that makes it unbypassable, and the app says so itself. A phone you own can be erased. Some protections can be removed in the iPhone’s own Settings in seconds, and Bramble cannot stop that; your Keyholder is told once Bramble notices, which can take hours or longer if you never open the app. What the wait does is hand the decision back to the man you were at two in the afternoon. A Keyholder is what puts a person in it. Without one, no one else is told.

So are porn blockers worth it?

Yes. Tonight, if you can. Just know what you are buying: time, at the hour it counts. Four things make that time worth more.

1. Cover the whole phone, not one browser. A filter that works only in Safari, or only on websites, leaves the rest of the phone open. Check what yours reaches: apps, other browsers, pictures. Apple’s free settings are a real start, and the iPhone guide sets them up and names what they miss.
2. Give the off switch to someone else. The Screen Time passcode, the account password, whatever turns it off. A friend, a brother, someone you can tell the truth. If you do only one thing on this list, do this one. If there is no one yet, choose a blocker whose off switch makes you wait, so the man who set it up still has a say at eleven at night. It is less than a person, and more than nothing. Then keep looking for the person.
3. Decide now who you will tell when you find the way around it. On some night you will. That is not a verdict on you; it is what the hour does. A man who has already picked a name has somewhere to go besides back.
4. Start on the reason. A blocker holds the door while you do the slower work of finding out what porn has been doing for you. Ten honest questions take about three minutes, and nothing you answer leaves the page.

A blocker alone has never been shown to free anyone. But it can hold the door long enough for you to find out what you were reaching for, and to tell someone. That is plenty to ask of a piece of software.