Your phone may reveal doctor, church and pharmacy visits

Nobody needs to follow you to know where you went this week. The phone in your pocket can already keep a record of your movements. And parts of that information can end up in the hands of other companies.

Your pharmacy. Your cardiologist. The church you attend on Sunday morning. The support group you’d rather nobody knew about. None of it necessarily comes from hacking. It can come from ordinary apps you installed yourself and the permissions you gave them. Here’s how your movements can get out, who buys location data and the settings that can limit how much gets shared.

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WHAT YOUR INTERNET PROVIDER, WEBSITES AND ADVERTISERS SEE

A smartphone can share location and other device data that may reveal sensitive details about where you go. (Tero Vesalainen/Getty Images)

Smartphones can use advertising identifiers that help advertisers and developers measure ads and activity. On Apple devices, the system advertising identifier is known as the IDFA. Android devices can use Google’s advertising ID.

Advertising identifiers can help connect activity across apps when apps and advertising systems are permitted to use them. Combined with location data and other signals, those identifiers can help companies build a much more detailed trail of where a device has been.

And a trail stops being anonymous fast. A device that sleeps at your address every night and turns up at a dialysis center every Tuesday and Thursday isn’t much of a mystery to anyone who can connect those locations with other identifying information.

An app asks for your location. Often for a fair reason, like providing a local forecast or showing the nearest pharmacy. What many people don’t realize is that apps can include advertising and analytics software from outside companies. Depending on the app, its permissions and its privacy practices, that technology may collect or receive information about your device and location. Location information can also become part of the digital advertising ecosystem, where information about a device can pass among multiple companies. Once location data leaves your phone, controlling where it goes next becomes much harder.

This isn’t a theory about what could happen. The government spent years fighting one such case in court. On May 4, 2026, the Federal Trade Commission announced a settlement that bars the data broker Kochava and its subsidiary, Collective Data Solutions, from selling, sharing or disclosing sensitive location data without people’s affirmative express consent, subject to the terms of the order. The FTC alleged Kochava sold location data from hundreds of millions of mobile devices that could track people to health facilities, places of worship and other sensitive locations. Kochava did not admit wrongdoing. Kochava wasn’t alone. In December 2024, the FTC took action against two more location data companies, Gravy Analytics and Mobilewalla, over allegations involving the sale of sensitive location data.

In January 2025, Gravy Analytics was breached. A hacker posted what they claimed was 17 terabytes of stolen data on a Russian cybercrime forum. Security researchers examining a sample found more than 30 million location points, including phones at the White House, the Kremlin and military bases around the world. The data reportedly came from everyday apps, including games and dating apps. Think about what that means. A company collects movements. Regulators take action over how sensitive location data gets handled. Then criminals allegedly obtain a massive collection of data anyway.

Strip out the technical language. A few weeks of location data can potentially reveal:

Those last few can turn a privacy problem into a safety concern. A device that regularly leaves a home at the same time and returns two hours later can reveal patterns about when someone may be away. Location information can also make a scam call more convincing. “I’m calling from the billing office at the clinic on Oak Street about your visit last week” is much harder to dismiss when the clinic and timing happen to be correct. And with Medicare Open Enrollment beginning October 15, a caller who seems to know your doctor or pharmacy may sound more convincing than a random scammer.

If you’ve ever tapped “Allow” on a weather app, a store app or a game, you may have shared it. You might have granted that permission years ago and forgotten about it. Even apps without precise location permission may be able to estimate your general area through information such as your internet connection. You can’t make yourself invisible, but you can make your movements harder to track.

You can’t stop your phone from knowing where you are and still use every location-based feature. But you can limit which apps get that information and reduce some of the identifiers used for advertising and tracking. None of this takes technical skill, and you can tackle one part at a time.

Advertising identifiers aren’t the only way companies can recognize a device, but limiting them can remove one tool used to connect activity for advertising purposes.

First, control whether apps can request permission to track you across other companies’ apps and websites:

When this setting is off, apps that request permission to track are treated as though you selected Ask App Not to Track. They cannot access Apple’s system advertising identifier, known as the IDFA.

Apple also has a separate setting for ads that Apple itself delivers:

This second setting limits how Apple personalizes the ads it delivers in services such as the App Store, Apple News and Stocks. It is separate from the app-tracking control above.

THE SCAMMER AT YOUR DOCTOR’S OFFICE MAY ALREADY KNOW WHO YOU ARE

Social media apps collect more data than many users realize, from clicks and contacts to location history. (Anna Barclay/Getty Images)

Depending on your Galaxy model and software configuration, you may also find Google’s advertising controls through Settings > Google > All services > Ads.

Deleting the advertising ID prevents apps from accessing that particular Google advertising identifier. It does not prevent every form of advertising, analytics or device identification.

Google says deleting the advertising ID removes that identifier. Apps that try to access it receive a string of zeros instead. Apps can still have their own privacy and advertising settings, so this does not eliminate every form of tracking.

Now look at which apps can see where you are and whether they really need that access.

You don’t have to turn Location Services off completely. Doing so can interfere with useful features. Instead, focus on apps that have more access than they need.

Pay particular attention to apps allowed to access your location all the time. Weather, shopping and similar apps often don’t need continuous background access.

YOUR HOME IS EMPTY. DO BURGLARS ALREADY KNOW?

Data broker listings often include sensitive details like your address, phone number and relatives, making removal a critical first step. (Kurt “CyberGuy” Knutsson)

A weather app, for example, usually doesn’t need to know exactly where you’re standing. Navigation is one situation where precise location makes much more sense.

Delete dormant apps. Every unused app is another set of permissions and data practices you may have forgotten about. If you haven’t opened an app since last year and no longer need it, consider deleting it.

If you have older relatives, their phones are worth checking next. They may be carrying years of old app permissions, and scammers frequently target older adults. Sit down with them for 10 minutes the next time you visit. Review location permissions, advertising controls and apps they no longer use.

Changing these settings can reduce future collection and sharing, but it doesn’t erase information that companies may have already collected. And here’s the piece many people miss. A location trail by itself may consist largely of coordinates and device information. It becomes much more revealing when someone can connect those movements with a name, home address, phone number or relatives. Some of that identifying information can come from people-search and data broker sites that publish or sell personal details. You can run a quick free scan to see what a scammer would see if they looked you up right now. If it shows details you never agreed to publish, you’ll be able to take action and get them removed.

This is where I strongly recommend using a personal data removal service. These services can automatically send removal requests to hundreds of data brokers, including people-search websites, on your behalf. They can also keep monitoring and resubmitting requests when your information reappears, which is important because data can return even after it has been removed. Get my picks for the best 2026 antivirus protection winners for your Windows, Mac, Android and iOS devices at CyberGuy.com.

Your phone can reveal far more about your life than you may realize. Location data can expose visits to doctors, pharmacies, places of worship and other sensitive locations, especially when it gets combined with advertising identifiers and other information about you. The FTC’s actions against location data brokers show this is not a hypothetical privacy problem. And the Gravy Analytics breach showed what can happen when enormous collections of location information fall into the wrong hands. I would start by reviewing which apps have access to your location and removing access from anything that doesn’t truly need it. Then limit app tracking on your iPhone or delete your advertising ID on Android if that option is available. These changes won’t make you invisible, but they can reduce the amount of information available to build a detailed trail of where you go. And don’t forget the phones belonging to parents or older relatives. Years of forgotten app permissions can leave far more information exposed than they realize.

When was the last time you checked which apps on your phone can see your location? Let us know by writing to us at CyberGuy.com.

Kurt “CyberGuy” Knutsson is an award-winning tech journalist who has a deep love of technology, gear and gadgets that make life better with his contributions for Fox News & FOX Business beginning mornings on “FOX & Friends.” Got a tech question? Get Kurt’s free CyberGuy Newsletter, share your voice, a story idea or comment at CyberGuy.com.