How to Stop Ad Tracking on Android and iPhone

You can reduce mobile ad tracking in a few minutes without blocking every ad or breaking normal app features. On Android, delete the device advertising ID, turn off personalized ads in Google’s My Ad Center, and restrict unnecessary location permissions. On iPhone, disable “Allow Apps to Request to Track,” revoke any existing app-level tracking permission, and turn off Precise Location for apps that do not need it.

These controls do different jobs. The advertising identifier limits one common way apps connect activity across services; location and other permissions control sensitive data at the source. For the strongest practical result, use both.

Quick privacy checklist

• Android: Settings → Privacy → Ads → Delete Advertising ID.
• Google account: Open My Ad Center and turn Personalized ads off if you do not want Google to tailor ads to your activity.
• iPhone: Settings → Privacy & Security → Tracking → turn off Allow Apps to Request to Track.
• Both platforms: Review location, contacts, Bluetooth, photos, microphone, and camera permissions app by app.
• Location: Prefer approximate location and “While Using” access unless an app genuinely needs more.

This guide explains what each switch changes, what it cannot change, and how to verify your settings afterward.

Why mobile ad tracking deserves a fresh review

Advertising identifiers are pseudonymous device identifiers used by parts of the mobile advertising ecosystem. They can help advertisers measure campaigns and connect activity from different apps. They are not your name, but they can become valuable when combined with app activity, location signals, account information, or other identifiers.

The issue became especially timely on September 4, 2026, when Reuters reported that the U.S. military had disabled advertising trackers on some devices amid concerns that commercially available location data could be used to target personnel. That does not mean every advertising ID exposes a precise location, but it illustrates why limiting unnecessary identifiers and location access is sensible.

It also helps to set realistic expectations: deleting an ad ID does not make a phone anonymous. Apps may use account logins, first-party analytics, cookies, IP addresses, or their own identifiers. Google’s own guidance notes that apps can have separate settings that affect the ads you see.

How to stop ad tracking on Android

1. Delete the Android advertising ID

1. Open Settings.
2. Tap Privacy, then Ads.
3. Tap Delete Advertising ID.
4. Confirm the deletion.

Those are the steps in Google’s official Advertising ID documentation. On some phones, the menu may sit under Security & privacy, More privacy settings, or Google → All services → Ads. Searching Settings for “Ads” or “Advertising ID” is usually the quickest route.

If your phone offers both Reset Advertising ID and Delete Advertising ID, choose Delete for the stronger privacy setting. Reset creates a new identifier, which can break the link to the previous identifier but leaves an ad ID available for future use. Delete removes the identifier from the device until you choose to create one again.

What changes: apps cannot use that Android advertising ID to recognize the device for advertising.

What does not change: ads will still appear, and apps can still use data you voluntarily provide, first-party account activity, or other permitted signals.

2. Turn off personalized ads in My Ad Center

Deleting the device ad ID and changing Google ad personalization are separate actions. To stop Google from tailoring ads in its own services:

1. Open My Ad Center while signed in to the correct Google account.
2. Select Personalized ads.
3. Turn personalization Off and confirm.

Google explains that this setting changes personalization across Google services but does not control every advertising platform or every app. If you use multiple Google accounts, review the setting for each one.

3. Restrict location access app by app

Advertising privacy is not only about the advertising ID. A weather, delivery, or mapping app may legitimately need location while you use it, but a calculator or wallpaper app usually does not.

1. Open Settings → Security & privacy → Privacy → Permission manager. Menu names vary slightly by manufacturer.
2. Tap Location.
3. Review apps under Allowed all the time, Allowed only while in use, Ask every time, and Not allowed.
4. Change unnecessary access to Don’t allow, Ask every time, or Allow only while using the app.
5. Turn off Use precise location when approximate location is enough.

Google’s Android permissions guide also lets you reach the same controls from Settings → Apps → choose an app → Permissions.

4. Check the Privacy Dashboard

Open Settings → Security & privacy → Privacy → Privacy Dashboard and inspect recent access to location, microphone, and camera. The dashboard is useful because it shows behavior, not just settings. An app with a defensible permission can still be worth restricting if it accesses sensitive data more often than expected.

How to stop app tracking on iPhone

1. Disable tracking requests

1. Open Settings.
2. Tap Privacy & Security.
3. Tap Tracking.
4. Turn off Allow Apps to Request to Track.
5. If prompted, choose the option that asks previously allowed apps to stop tracking.

Apple says that when this setting is off, future requests are treated as if you selected Ask App Not to Track. Under Apple’s rules, the developer cannot access the system advertising identifier, called IDFA, and is not permitted to track you across other companies’ apps and websites using other identifying information. You can also disable tracking for individual apps from the same screen.

This setting does not prevent an app from using information about what you do inside that app for its own service, subject to its privacy policy and your other permissions. It is a cross-app and cross-company tracking control, not a universal data-blocking switch.

2. Limit precise and background location

1. Open Settings → Privacy & Security → Location Services.
2. Select an app.
3. Choose Never, Ask Next Time Or When I Share, or While Using the App as appropriate.
4. Turn Precise Location off when the app only needs a general area.

Apple’s Location Services guide confirms that disabling Precise Location shares an approximate location instead. Navigation and emergency-related apps are obvious cases where precise location may still be useful; a local news or shopping app often works with an approximate area.

3. Turn on App Privacy Report

Go to Settings → Privacy & Security → App Privacy Report, then tap Turn On App Privacy Report. After using your phone normally, return later to review data and sensor access as well as network activity. Apple says the report data is encrypted and stored on the device.

The report will not label every connection as good or bad, but it can reveal an app contacting many domains or accessing location, photos, the microphone, or the camera more often than expected. Apple provides more detail in its App Privacy Report documentation.

Do these settings stop location-data collection?

They reduce several common paths, but no single switch stops all collection. An app can learn your location directly if you grant location permission. It can infer a rough area from an IP address. A signed-in service may connect activity to your account, while websites can use cookies and other browser storage.

For a meaningful privacy improvement, combine advertising controls with these habits:

• Remove “Always” location access from apps that do not need background operation.
• Use approximate location where possible.
• Deny contacts and Bluetooth access unless they support a feature you use.
• Delete apps you no longer need rather than leaving permissions active.
• Review privacy settings after major phone updates or migrations.
• Check settings inside high-use social, shopping, fitness, navigation, and weather apps.

If you are cleaning up a wider digital footprint, also see our guide to removing your phone number or home address from Google Search. AI services have separate controls, covered in our guide to stopping ChatGPT, Claude, and Gemini from using chats for training. Instagram users can additionally reduce contact-based discovery with our Instagram account-suggestion privacy steps.

How to verify the changes worked

On Android

• Return to Settings → Privacy → Ads. The screen should offer to get a new advertising ID rather than displaying reset/delete controls for an active one.
• Open My Ad Center and confirm Personalized ads shows Off.
• Review Location in Permission manager and verify only necessary apps retain access.

On iPhone

• Return to Settings → Privacy & Security → Tracking and confirm the master switch is off.
• Review Location Services for apps set to Always or with Precise Location enabled.
• Use App Privacy Report for several days and investigate unexpected sensor or network activity.

Common questions

Will turning off ad tracking remove ads?

No. You will generally continue to see ads. They may be less personalized because apps and advertising services have fewer approved signals for connecting activity to your device or account.

Should I reset or delete the Android advertising ID?

Delete it if your goal is to make the identifier unavailable. Resetting only replaces the old value with a new one. Reset can be useful for troubleshooting or breaking an existing identifier link, but deletion is the clearer privacy choice.

Does turning off Google personalized ads affect every Android app?

No. My Ad Center controls personalization by Google. Other apps and ad platforms can have their own identifiers, consent screens, accounts, and privacy settings. That is why deleting the Android advertising ID and reviewing permissions are also important.

Does Apple’s tracking switch stop all data collection?

No. It controls tracking across other companies’ apps and websites. An app can still process data needed to provide its own service, subject to your permissions, its disclosures, and applicable law.

Could these changes break an app?

Deleting an advertising ID should not break ordinary app functions, though ad measurement and personalization may change. Denying essential permissions can affect features: navigation needs location, video calling needs a camera and microphone, and photo editors need access to selected media. Change permissions according to the feature you actually use.

The practical bottom line

The best low-friction setup is to delete the Android advertising ID or disable iPhone tracking requests, turn off account-level ad personalization you do not want, and then remove unnecessary precise or background location access. This will not make a smartphone invisible, but it closes several major tracking routes while preserving the features you choose to keep.