How to block trackers on iPhone
You do not need a dozen apps to stop being profiled. Five steps, in order of payoff, cover most of it.
A few settings do most of the work.
Tracking on a phone happens in two places: in the browser, where scripts and pixels follow you between sites, and across apps, where companies match your activity to an advertising profile. The good news is that iOS gives you strong levers for both, and the highest-impact ones take minutes.
Here they are in order of how much they actually reduce tracking, so you can stop at the point that fits your threat model.
In order of payoff
- Turn off app tracking (App Tracking Transparency) so apps cannot link your activity.
- Add a Safari content blocker to kill web trackers and ads.
- Use a private browser for tracking-heavy sites.
- Set a private/encrypted DNS to block tracker domains network-wide.
- Prune app permissions — location, contacts, photos — that leak data quietly.
1. Stop cross-app tracking
Go to Settings → Privacy & Security → Tracking and turn off "Allow Apps to Request to Track." This applies App Tracking Transparency to everything, so apps cannot access the advertising identifier used to stitch your behaviour together across services. It is one toggle and it cuts a large slice of commercial tracking instantly.
2. Block web trackers in Safari
Install a Safari content blocker and enable it under Safari’s extensions. As covered in how content blockers work, this removes ads and the trackers behind them on-device, without the blocker ever seeing your browsing. This is the single best step for web tracking specifically.
3. Reach for a private browser when it matters
For sites you know are tracking-heavy, a private browser that blocks trackers and resists fingerprinting by default adds another layer beyond Safari’s built-in protections.
4. Consider encrypted DNS
A private, encrypted DNS profile can block known tracker and ad domains for every app, not just Safari, and hides your DNS lookups from the network you are on. It is a step up in effort but covers the gaps a Safari-only blocker leaves.
5. Audit permissions
Finally, sweep Settings → Privacy & Security and pull back location, contacts, microphone and photo access from apps that do not need it. Set location to "While Using" or "Ask Next Time," and switch photo access to "Selected Photos." These quietly stop a lot of passive data collection.
What not to bother with
Skip "cleaner" and "antivirus" apps that promise to scrub trackers — iOS sandboxing means they cannot do what they claim, and several are trackers themselves. You also do not need a paid VPN purely to block ads; a content blocker and DNS do that more cheaply and more privately. Spend effort on the five steps above and you have covered the great majority of real-world tracking.
Blocking trackers, answered
Does turning off tracking actually do anything?+
Yes. App Tracking Transparency blocks apps from accessing the identifier advertisers use to link your activity across services, which removes a major input to cross-app profiling. It is the highest-payoff single toggle on iOS.
Is a content blocker or a VPN better for tracking?+
For web trackers, a content blocker is more direct and more private — it works on-device and sees nothing. A VPN hides your IP and traffic from the network but does not, by itself, strip trackers from pages. They solve different problems.
Can I block trackers in all apps, not just Safari?+
Largely, with an encrypted DNS profile that blocks tracker domains network-wide, plus tight app permissions and App Tracking Transparency. No single switch covers every app, but together these get most of the way.