Best porn blocker for iPhone: how to choose

The best porn blocker for most iPhones is the one already in Settings: the Screen Time content filter, which is free and runs at the system level. Pay for an app only if you want something the filter does not do, such as blocking specific apps, a plan for the minute an urge hits, or someone else seeing your activity.

This page compares the kinds of blocker by how they work. Where it names a product, the claim comes from that product’s own App Store listing, as listed on 6 October 2026. One of the apps here is ours, and that section is labelled.

Start with the free one already in Settings

Every iPhone has a web content filter in Screen Time. Apple calls the setting Limit Adult Websites, and it sits under Content & Privacy Restrictions. It costs nothing, needs no account and takes about five minutes to switch on. The exact taps are in how to block porn on an iPhone.

Once it is on, iOS applies it, so it keeps working whether any app is open or not. Apple documents the behaviour only as blocking adult content. It is not a list you maintain, and it is not perfect.

Set a Screen Time passcode as part of the same five minutes. Without one, the filter is a toggle anyone holding the phone can flip. The short version of all this has its own page: can you block porn on an iPhone for free.

The four ways an iPhone blocker works

Most apps sold as a porn blocker for iPhone use one of four mechanisms, and each misses something different. The longer comparison of three of them is in system filter vs DNS vs app blocker.

Kind	Where it filters	What it misses
System Screen Time filter	iOS itself, at the system level	Whoever has the Screen Time passcode can turn it off
DNS filter	The address lookup for each site	Can drop when the network or profile changes, and sees names, not pages
VPN-based filter	Traffic sent through a tunnel the app sets up	Stops covering you when the tunnel is off, and it is a switch in Settings
In-app browser	Only inside the app’s own browser	Every other browser and every in-app browser in social apps

System Screen Time filter. iOS does the filtering, either because you set it in Settings or because an app asked the system to turn it on. There is no app to force quit that turns it off. Apps can also use Screen Time to block other apps you choose, which the Settings filter does not do on its own.

DNS filter. It changes where your phone looks up web addresses. A blocked site’s lookup returns nothing, so the page fails to load. It covers apps as well as browsers. It sees only the name of the site requested, so it is coarse, and a change of network or a removed profile can take it away.

VPN-based filter. The app routes your traffic through a tunnel and filters what passes through it. It can see more than a DNS lookup, depending on how it is built. The tunnel is a setting, and when it is off, nothing is filtered.

In-app browser. The app ships its own browser and filters inside it. It is the simplest kind to build and the simplest to get around: open any other browser, or a link inside a social app, and it is not involved. Deleting the app takes a few seconds.

Many paid apps combine two of these. Read the listing for which mechanism it uses, because the mechanism decides what it misses. If a blocker has come off your phone before, why porn blockers stop working covers the usual reasons, and most of them are not the mechanism.

Accountability apps vs private apps

The second split is who sees what the blocker sees.

Accountability apps send a record of your activity to someone you choose. As listed on 6 October 2026, Victory Shield by Covenant Eyes describes capturing screenshots from Safari, with your permission, and making them available to an ally you pick, along with reporting explicit domains from any app on the device. Its listing says it requires a Victory account and is for subscribers.

Private apps keep the record with you. Nobody is sent a report. The trade is real in both directions. Reporting progress to someone strengthened the effect of tracking it in a large meta-analysis, which is covered in should I tell someone I am quitting. A report about porn also gives some people a reason to delete the app, which is the reasoning in why there is no leaderboard.

If you have a person you trust and you want them to see your activity, an accountability app is built for that. If you do not, a private app avoids setting up a relationship you are not ready for. The two models are compared in more detail in a Covenant Eyes alternative for iPhone.

Questions to ask before you pay

Each of these can be answered from the App Store listing before you install.

1. Which mechanism does it use? System filter, DNS, VPN, in-app browser, or a mix. The table above says what each one misses.
2. Does it block apps, or only websites? Many accounts of a bad night start in an ordinary app, as covered in it usually starts on a feed.
3. Does it need an account? An account means your data lives somewhere other than the phone. Check the App Privacy section of the listing, which the developer fills in.
4. Who sees your activity? You, a named ally, or a community.
5. What happens after a slip? Some apps reset everything to zero. Some keep the days you already logged.
6. What is free and what is paid? Read the subscription section in the listing. Prices vary by country, so check the App Store in your own region.
7. Does it run on your device? Some apps are iPhone only. The listing says which devices it supports.

Where Monke Reset fits

This section is about our app.

Monke Reset is an iPhone app. It blocks adult sites with Apple’s Screen Time filter, the same system filter described above, plus any apps you pick. The filter keeps working when the app is closed.

The rest of the app is for the parts a filter does not touch:

• Help, one tap from the home screen. It opens on a reason you wrote down, gives you one line at a time to hold on to, and keeps your pledge close. It ends on “I’m okay”, which logs an urge resisted, or “I relapsed”.
• A full-year calendar. A slip costs one day. Past days, your best run and your total days free stay where they are.
• A streak and your best run, plus a 90-day plan with an end date.
• A short library of articles, talks and guided meditations.

It needs no account. Your streak, reasons and pledge stay on the phone. It has no leaderboard, no community and no AI coach, so it suits people who want to do this privately. If you want someone to see your activity, an accountability app fits better.

It is a paid subscription billed by Apple, with everything unlocked from the first screen and no second paywall. You can cancel in iPhone Settings. The App Store shows the current terms in your currency before you are charged.

For how it compares with quit apps rather than blockers, see a QUITTR alternative.

What none of them can do

Every blocker on iOS that uses Screen Time can be switched off by anyone who knows the Screen Time passcode. That includes the free filter, every app that relies on it, and Monke Reset. A DNS profile or a VPN can be removed in Settings too, by whoever can unlock the phone.

What a blocker can do is take porn off the one-tap path and put a passcode and a minute of friction in front of it. A passcode you have not memorised, or one held by someone you trust, makes that minute longer.