How to Stop Apps From Tracking You Across Websites on iPhone

Targeted adverts can feel uncanny. You browse shoes in one app and see the same shoes inside a game, a news app, and your browser for a week. That follow-you feeling comes from cross-app and cross-website tracking, and on iPhone you have strong, built-in tools to stop most of it.

You do not need a paid privacy app or technical skills. iOS 27 lets you block every tracking request at once, answer each request yourself, tighten Safari, and limit the data individual apps can reach. This guide walks through each control in order, from the single biggest switch to the smaller settings that finish the job.

Quick Answer

To stop apps from tracking you across websites on iPhone, go to Settings, tap Privacy and Security, tap Tracking, and turn off Allow Apps to Request to Track. This blocks all apps from asking and stops cross-app tracking permission for every app at once. For extra protection, also turn on Prevent Cross-Site Tracking in Safari settings and review location permissions.

How Cross-App Tracking Works

When an app tracks you, it combines information about your activity with data gathered by other companies. Advertisers use a shared identifier and data collected from many apps and websites to build a profile: what you buy, what you read, where you go, and what you might want next.

Apple’s App Tracking Transparency system interrupts that process. An app must ask your permission before it tracks you across other companies’ apps and websites or uses Apple’s advertising identifier. If you say no, the app loses that identifier and breaks the rules if it tries to follow you in other sneaky ways instead.

Stopping this tracking does not stop all adverts. You will still see ads, but they will be based on the app you are using at the time rather than a profile assembled from your whole digital life. For most people, that trade is well worth it.

Method 1: Block All Tracking Requests at Once

This is the setting most people should use. One switch ends the pop-ups and the tracking permission together.

1. Open Settings.
2. Tap Privacy and Security.
3. Tap Tracking.
4. Turn off Allow Apps to Request to Track at the top of the screen.
5. Leave the page. The change applies immediately to every app.

After this, new apps cannot show the tracking pop-up, because they are not allowed to ask. Existing apps lose their tracking permission as well. It is the cleanest answer if you already know you never want this kind of tracking, and it is the method Apple describes in its own guidance on preventing apps from tracking your activity across apps and websites.

What Changes After You Turn It Off?

• No more “Allow this app to track your activity?” pop-ups
• Adverts become less personal and sometimes less relevant
• Apps keep working in almost all cases, including free apps
• Nothing changes about data an app collects inside itself, so other settings in this guide still matter

Method 2: Stop Tracking App by App

Some people prefer choice. Perhaps you trust one retailer’s app and want its personal offers, but trust nobody else. In that case, leave the main switch on and decide individually.

1. Open Settings, tap Privacy and Security, then tap Tracking.
2. Leave Allow Apps to Request to Track turned on.
3. Go through the list and turn off the switch beside every app you do not want tracking you.
4. When a new app shows the pop-up, tap Ask App Not to Track rather than Allow.

Be honest with yourself about this method. It only stays strong if you keep saying no. Many people tap Allow once when in a hurry and forget to change it later. If that sounds familiar, use Method 1 and remove the temptation entirely.

If you are not sure which apps have been following you so far, check first with the steps in our guide on how to check if an app is tracking you on iPhone, then come back and block the offenders here.

Stop Website Tracking in Safari

Apps are only half the picture. Websites track through cookies and other site data, so tighten Safari as well.

1. Open Settings and scroll down to Apps, then tap Safari. On some layouts Safari appears directly in the main Settings list.
2. Scroll to the Privacy and Security section.
3. Turn on Prevent Cross-Site Tracking if it is not already on.
4. Consider turning on Block All Cookies only with care, because some sites stop working properly without cookies.
5. Tap Advanced, then Privacy Preserving Ad Measurement settings if shown, and review the fingerprinting and link tracking protections available in iOS 27.

Use Private Browsing and Clear Old Data

Safari Private Browsing windows do not save your history and limit site tracking further, which helps for one-off research or shopping comparisons. To clear data already stored, go to Settings, Safari, and tap Clear History and Website Data. Remember this signs you out of most websites, so do it at a convenient moment, not in the middle of something important.

Apple’s overview of Safari privacy protections on iPhone explains cross-site tracking prevention and private browsing in Apple’s own words if you want more depth.

Limit the Data Apps Can Reach

Tracking controls work best alongside sensible permissions. An app that cannot reach your location, contacts, or photos has far less to share or link in the first place.

• Location: In Privacy and Security, open Location Services and set most apps to While Using the App. Turn off Precise Location for apps that only need your general area.
• Photos: Give apps limited photo access instead of your full library when iOS offers the choice.
• Contacts: Only messaging, email, and calling apps normally need contacts. Games and shopping apps rarely do.
• Bluetooth and Local Network: Deny these unless an app controls a device in your home or connects to an accessory you own.
• Advertising identifier: With tracking permission off, apps cannot use Apple’s identifier for cross-app ads, which removes the common thread linking your activity.

Review this list every few months. Permissions creep back as you install new apps and tap through setup screens quickly.

What Stopping Tracking Cannot Do

Honest expectations matter. These settings stop cross-app tracking permission and reduce website tracking, but they do not make you invisible. An app still knows what you do inside that app. A shop still knows what you bought from it. Your network provider and the websites you sign in to still see their own records of your visits.

Developers are also forbidden from using workarounds, called fingerprinting, to track users who said no, but enforcement is an ongoing process. That is why layering helps: block tracking requests, limit permissions, keep Safari protections on, and delete apps whose behaviour you dislike. Each layer removes another piece of the profile.

Common Mistakes to Avoid

• Tapping Allow without reading: The pop-up appears once at a busy moment. Slow down; your first answer sticks until you change it in Settings.
• Only fixing apps, not Safari: Website tracking continues unless you turn on Prevent Cross-Site Tracking.
• Blocking all cookies blindly: This can break logins, baskets, and banking sites. Use it only if you accept the inconvenience.
• Trusting a VPN to do this job: A VPN hides your connection from your network, but it does not replace App Tracking Transparency settings inside apps.
• Forgetting new apps: With the main allow-requests switch on, every new install is a fresh decision. The global off switch avoids this entirely.

Extra Tips for a Quieter, More Private iPhone

Turn on the App Privacy Report in Privacy and Security to watch which domains your apps contact after you change these settings; the busiest trackers should fade from your list. Use Sign in with Apple where offered, since it can hide your real email address behind a private relay. Avoid signing in to unrelated apps with your social media accounts, because that links your activity across services by design.

Finally, keep your software current. iOS 27 privacy improvements, including stronger link tracking and fingerprinting protections in Safari, only protect you if the update is installed.

Conclusion

Stopping cross-app tracking on iPhone starts with one powerful switch: turn off Allow Apps to Request to Track in Settings under Privacy and Security and Tracking. Add Safari’s Prevent Cross-Site Tracking, review location and data permissions, and delete apps you do not trust. You will still see adverts, but they will no longer be built from a profile that follows you everywhere. Take five minutes to apply these settings today and your iPhone will feel noticeably more like yours again.

Frequently Asked Questions

If I turn off tracking requests, will apps stop working?

Almost never. Apps must work without tracking permission. You may see more general adverts and fewer personal recommendations, but normal features, purchases, and accounts continue as before.

What is the difference between blocking tracking and blocking cookies?

Tracking settings control apps following you across other apps and websites. Cookies are small files websites store in your browser. Safari has separate controls for website cookies and cross-site tracking.

Can an app still track me after I say no?

Under Apple’s rules, no. Apps that ignore a refusal or use fingerprinting workarounds break App Store policy. Use the App Privacy Report to watch network behaviour and delete any app you suspect.

Should I leave the main tracking switch on for some apps?

Only if you genuinely want a specific app’s personalised experience and trust that company. For most people, turning the main switch off for all apps is simpler and more private.

Does Private Browsing in Safari stop all website tracking?

It reduces tracking and does not save history, cookies, or form data after you close the tabs, but websites can still see activity during that session. Combine it with Prevent Cross-Site Tracking for the best result.