Mamori / Guides

Private Browsing, Incognito and Porn Blockers: What Gets Around What

Updated

On this page
  1. What private browsing and Incognito actually do
  2. What they do not do
  3. Does Screen Time's Limit Adult Websites apply in a private tab?
  4. Is there a setting that turns private browsing off?
  5. SafeSearch and Incognito
  6. Two other settings that change the path
  7. A five-minute test on your own phone
  8. FAQ
  9. Where Mamori fits

Short answer: Private Browsing in Safari and Incognito in Chrome change what your device saves, and Google says plainly that Incognito "doesn't make you invisible". The Apple Screen Time pages and Google SafeSearch pages that we read do not say whether their filters still apply inside a private window, so the honest answer is to test it on your own device. This guide shows what each side documents and a quick way to check.

Version note: Checked on 27 Oct 2026 against Apple's iPhone User Guide pages for iOS 18, iOS 26 and iOS 27, and Google's Chrome Help pages for Android, iPhone and iPad, and computers. The Screen Time menu names below match the iOS 18 and iOS 26 pages. Apple's iOS 27 page for your own iPhone no longer lists the Web Content steps, so check those screens if you are on iOS 27.

What private browsing and Incognito actually do

Apple describes Private Browsing in Safari as a way to "open private tabs that don't appear in History on iPhone or in the list of tabs on your other devices". Tabs in Private Browsing "aren't shared with your other Apple devices". Apple also says that if you have a passcode set on your iPhone, Private Browsing locks when it is not in use.

Google's description of Incognito is similar. When you browse in Incognito, "Chrome limits the information that's saved to your device". After the session ends, "Chrome doesn't retain site data or a record of the sites you visited". Bookmarks you save and files you download stay.

Both are about what is stored on the device.

What they do not do

Google is direct about the limit: "While Incognito can help keep your browsing private on your device, it doesn't make you invisible. Websites you visit, including Google sites, and organizations that manage your network, like your school, employer, or internet service provider, may be able to observe your activity in Incognito."

That sentence matters for blockers. A tool that works at the network level (a router setting, or a DNS filter) sits outside the browser window. In our reading, that suggests a private window is not a way around it. We did not find an official DNS-filter page that tests private windows, so treat this as a reason to test, not as a guarantee.

Does Screen Time's Limit Adult Websites apply in a private tab?

On iPhone, the built-in web filter is in Screen Time. The path on Apple's iOS 18 and iOS 26 pages:

  1. Open Settings.
  2. Tap Screen Time.
  3. Tap Content & Privacy Restrictions, then turn on Content & Privacy Restrictions.
  4. Tap App Store, Media, Web, & Games, then tap Web Content.
  5. Select Limit Adult Websites, tap Add Website below Never Allow, and enter the URLs of the websites you want to block.

We opened Apple's Screen Time pages for iOS 18, iOS 26 and iOS 27, and Apple's parental controls page. None of them mentions Private Browsing. You may read elsewhere that Limit Adult Websites switches Private Browsing off in Safari. The Apple pages that we opened do not say so, so do not assume it. Our full steps are in the guide to blocking porn on iPhone: How to Block Porn on iPhone (and Adult Websites on iPad Too).

Is there a setting that turns private browsing off?

For an adult's own phone, we did not find one on the official pages we read.

  • Safari on iPhone. Apple's page offers a lock, not an off switch. Go to Settings > Apps > Safari, then turn on Require Passcode to Unlock Private Browsing, Require Face ID to Unlock Private Browsing or Require Touch ID to Unlock Private Browsing (the last two on supported models). That asks for your passcode or biometrics. It does not stop you.
  • Chrome on Android. Google's page describes locking Incognito tabs: tap More, then Settings, then Privacy and security, and turn on Lock Incognito windows when you leave Chrome. That is a lock for other people using your phone.
  • Managed devices. Google's Chrome Enterprise page for administrators lists a policy, IncognitoModeAvailability, where 1 means "Incognito mode disabled: Users can't open webpages in an Incognito window". It is written for people who manage Chrome for a business or school, so it is not a phone setting for you.
  • Children's accounts. Google For Families Help says "Incognito mode is turned off when your child is signed in to Chrome with an account managed by Family Link". That is for a child's account, not for an adult blocking for themselves.

If you expected a toggle, that is the picture from the official pages: locks and admin policies, and no consumer switch that we could verify.

SafeSearch and Incognito

Google's SafeSearch page says "SafeSearch only works on Google Search. It doesn't affect content on other search engines or websites." It also says that if you have a Google Account you can manage SafeSearch "for your personal account or browser", and that "Administrators of your device or network can lock the SafeSearch in 'Filter.'" The page does not mention Incognito, so we cannot tell you how an account or browser setting behaves in one. Google's separate page on locking SafeSearch describes a device-level method that "works for all browsers on your device and users who are administrators on the device can undo this change". Our SafeSearch guide covers the settings: How to Turn On SafeSearch on Google, Bing and YouTube.

Two other settings that change the path

  • Secure DNS in Chrome. Google's page for computers says "By default, secure DNS in Chrome is turned on in automatic mode", that you can select a custom provider, and that if your device is managed or parental controls are turned on, "you can't use Chrome's secure DNS feature". Our reading: a provider chosen inside Chrome is a different path from the DNS your phone or router uses, so check it if you rely on a DNS filter. Setup steps are in our DNS guide: DNS to Block Porn: Free Family DNS on Android, Step by Step.
  • iCloud Private Relay. Apple's developer page says Private Relay "protects users' web browsing in Safari, DNS resolution queries, and insecure http app traffic", and that a network can block it. Apple's Screen Time pages do not say how it interacts with Limit Adult Websites, so if you use iCloud+, test with it on and off.

A five-minute test on your own phone

This is our suggestion, and it needs no adult site. Use an ordinary site you will not miss, such as example.com, as a stand-in.

  1. Add that site to your blocker's own block list (in Screen Time, Add Website below Never Allow).
  2. Open it in a normal tab and confirm it is blocked.
  3. Open it in a Private Browsing or Incognito tab.
  4. Try it in every browser app installed on the phone.
  5. If a private tab loads it, the gap is real on your setup. If it is blocked everywhere, you have evidence instead of an assumption.

Chrome on Android has its own steps for adult sites: How to Block Adult Sites in Chrome on Android.

FAQ

Does Incognito bypass a porn blocker?

It depends on where the blocker works. Google says organizations that manage your network may be able to observe activity in Incognito, which suggests network-level filters are not tied to the window. For Screen Time and SafeSearch, the official pages we read do not say, so test.

Why is Incognito mode not working on my phone?

Possible reasons from the pages above: on a child's account managed by Family Link, Incognito is turned off; on a work or school device, an administrator can disable it with a policy. We did not find an official page covering every cause, so check your device's settings.

Can I make private browsing impossible on my own phone?

Not with any consumer setting we could verify. You can add friction: keep a lock on private tabs, and use a blocker with a delay or a code held by someone else. In our view, a block you can undo in two taps is a speed bump.

Where Mamori fits

Mamori is a newer app for iPhone, iPad and Android. It blocks 2.5M+ adult sites across the whole phone, not just one browser. On Android that is an on-device DNS filter using Android's VpnService, with no remote VPN server, no browsing logs and nothing uploaded. On iPhone and iPad it uses Apple's Screen Time web content filter plus its own blocklist, so the Apple caveats above apply to that part. It also forces SafeSearch on Google, Bing and other search engines. Because it is not a setting inside one browser, run the five-minute test with it on, since we found no official page documenting private windows for any filter.

Before you can switch it off, you pass a cooldown timer, a random phrase, or a PIN or passphrase that a trusted person can hold. When protection is off, everything is off by design, and the friction is the lock you chose in advance. Honest limits: on Android only one VPN can run at a time, so another VPN or blocker that takes the slot switches Mamori's filter off. It has no accountability reports, it does not replace support from people or a professional, and it is built for adults blocking for themselves.

There is a 7-day free trial on the monthly and annual plans, plus a one-time lifetime option.

Related guides

Porn Blockers and VPNs: How They Interact on Android and iPhoneDoes a VPN bypass a porn blocker? It depends on how the blocker works. Android allows one VPN at a time. What that means, plus the iPhone side. How to Block Websites on Chrome (Windows, Mac and Chromebook)Chrome has no built-in switch to block a site you choose. Here is what Google, Apple and Microsoft do offer on Windows, Mac and Chromebook, and the gaps. Website Not Allowed on iPhone? What the Message Means and How to Change ItSeeing a website not allowed or restricted message on your iPhone? Learn what causes it and how to change it if you set it yourself. iOS 18, 26 and 27.

Sources

Last checked 27 Oct 2026. This guide is general information, not medical advice.