How to Reduce What Social Apps Know About You

Social apps learn about you from four main places: the permissions you give the app on your phone, the people in your contacts, what you do on other apps and websites, and what you post and fill in yourself. You can't shut all four off and still use the app, but you can cut each one down a lot in an afternoon.

Here's where to start, roughly from most to least effect for the effort.

Start with your phone's permissions

Your phone's operating system decides what an app can reach: your location, contacts, photos, microphone, camera and more. These switches sit outside the app, so they work even when the app's own settings change.

On an iPhone, go to Settings, then Privacy & Security, and go through each category. On Android, open Settings, then Security & privacy or Privacy, and look for the permission manager. Menu names differ between phone makers, so search settings for "permission" if you can't find it.

For each social app, ask what it actually needs:

• Location: rarely needed. Choose "Never", or "While using" with precise location turned off.
• Contacts: almost never needed. Turning this off stops the app from uploading your address book.
• Photos: on recent iPhones and Android phones you can grant access to selected photos only, instead of your whole library.
• Microphone and camera: allow them only if you post video or make calls in the app, and check the setting again after big updates.

Stop the contact upload

When you let an app "find friends", it typically uploads your contacts' names, phone numbers and email addresses to its servers. That helps it map your social circle, including people who have never joined.

Turning off the phone permission stops future uploads. Many apps also have a setting to stop syncing and to delete contacts already uploaded. On Meta's apps, look in Accounts Center for contact uploading. On X, it's in the discoverability and contacts section, where you can also remove imported contacts. On TikTok, look under privacy for contact syncing.

While you're there, turn off "let people find you by phone number or email". Those lookups are a common way for strangers to connect a pseudonymous account to your real identity.

Cut tracking from other apps and websites

Many websites and apps send information about what you do on them back to the big platforms through tracking code and data-sharing deals. That's how an app can show you an ad for shoes you looked at somewhere else.

You have a few tools:

• On iPhone, App Tracking Transparency lets you refuse when an app asks to track you across other companies' apps and websites. You can also turn off "Allow Apps to Request to Track" under Privacy & Security, then Tracking, so every app is refused automatically.
• On Android, you can delete your advertising ID under Settings, then Privacy, then Ads, on recent versions. Apps then get a blank ID instead of one that ties your activity together.
• On Meta's apps, look for "Your activity off Meta technologies" in Accounts Center. You can clear past activity and stop future activity being linked to your account.
• In your browser, use one that blocks third-party trackers by default, or turn on its strict tracking protection.

None of this removes ads. It removes some of what the ads are based on.

Review ad and data use settings

Each app has ad settings, and newer ones cover AI training. They're worth five minutes per app. Turn off personalization based on partners' data, review the interest categories the app has guessed for you, and decide whether you're comfortable with your posts being used to train AI models. Some of these switches are on by default and are easy to miss, especially after a policy update.

The privacy checker lists where these usually sit on eight apps.

Share less in your profile

The things you type in are the most accurate data an app has. Look at your profile with fresh eyes:

• Do you need your full birth date, or just to confirm you're old enough?
• Is your phone number on the account only for two-factor authentication? If so, an authenticator app can replace it on most platforms.
• Does your bio name your employer, your neighborhood and your kids' school? Together those make you easy to find.
• Is your profile photo the same one you use on LinkedIn and your work site? That makes reverse image searches easy.

Watch photos and location tags

Photos taken on a phone can carry hidden metadata, including the GPS location where they were taken. Many big platforms strip it when you upload, but not every service does, and the photo itself can give a lot away: a house number, a street sign, the view from your window, a school uniform.

Turn off location saving in your camera app if you don't need it. Post vacation photos after you're home. Be careful with live location features, such as map views that show friends where you are right now.

Use the browser for apps you rarely open

If you only check a platform now and then, consider deleting the app and using the website. A browser tab can't read your contacts or photo library unless you hand them over, and it can't run quietly in the background.

Ask what they have, then ask them to delete it

Most big platforms let you download a copy of your data from your account settings. Look through it. The ad interests and off-app activity sections often explain exactly why you see what you see.

Depending on where you live, privacy laws may give you the right to have certain data deleted or corrected. The EU's GDPR and California's privacy law are the best known. Platforms usually have a privacy request form linked from their privacy policy.

If you decide to leave entirely, our guide to leaving a platform without losing your network walks through downloading, announcing and deleting in the right order.

FAQ