It counts your steps. It monitors your heart. It tracks your sleep. But your smartwatch is doing something else entirely something the glossy product page never mentioned.
Somewhere on your wrist right now is a device more intimate than your phone, more revealing than your search history, and more valuable to corporations than almost any other piece of technology you own.
You paid for it. But you’re not the only one benefiting from it.
Smartwatch ownership crossed 500 million globally in 2025. In India, affordable fitness bands have brought biometric tracking to tens of millions for the first time. In the US and UK, Apple Watch and Fitbit are as common as car keys. Everyone wears one. Almost nobody has read what wearing one actually means.
What Your Smartwatch Actually Collects
Most people think their smartwatch tracks steps and heart rate. That is the smallest part of what it collects.
Your smartwatch knows your resting heart rate – which reveals cardiovascular health, stress levels, and fitness age. It tracks your heart rate variability a metric so sensitive it can detect anxiety, emotional distress, and early signs of illness before you feel symptoms.
It monitors your sleep architecture – how long you sleep, how deeply, how often you wake, and whether your patterns suggest insomnia, sleep apnea, or chronic stress. It tracks your menstrual cycle if you use that feature data so sensitive it became a legal flashpoint in the US after 2022.
It logs your GPS location continuously every walk, every commute, every place you stop and for how long. It measures your blood oxygen levels, skin temperature, and in newer models your stress score in real time.
Together, this data paints a portrait of your physical and emotional health more comprehensive than most medical records.
Who Gets to See It
Here is the part the marketing never covers.
Your smartwatch manufacturer stores everything on cloud servers. Apple, Fitbit now owned by Google Garmin, Samsung, Xiaomi. Every biometric data point you generate is uploaded, stored, and accessible to the company indefinitely unless you actively delete it.
In the US, health data collected by wearables is not covered by HIPAA the law protecting medical records because smartwatch companies are not classified as healthcare providers. This means your most intimate health data has fewer legal protections than your Netflix viewing history.
In the UK, ICO guidelines require meaningful consent for health data collection. In practice, that consent is buried in a 47-page terms document you agreed to in the setup process without reading.
In India, biometric data regulation remains limited. Millions of users of affordable fitness bands from Chinese manufacturers have virtually no visibility into where their health data is stored, who accesses it, or what country’s laws govern it.
Insurance companies have actively lobbied in the US and UK for access to wearable data to inform premium pricing. Several US insurers already offer discounts in exchange for sharing fitness data a trade that sounds beneficial until you consider what happens when your metrics decline.
Data brokers purchase health and wellness data from app ecosystems connected to wearables. That third-party period tracking app connected to your watch? That meditation app synced to your stress score? Both are potential data exits.
The Data Point Nobody Talks About
Your resting heart rate at 3am is more revealing than anything you’d voluntarily share.
It tells a story about your alcohol consumption, your mental health, your relationship stress, your financial anxiety. It tells that story every single night silently, accurately, and permanently.
In 2024, researchers demonstrated that smartwatch data could predict depressive episodes with 80% accuracy up to two weeks before clinical symptoms appeared. The same data that helps you sleep better is precise enough to flag you as a mental health risk to an insurer or employer.
This is not hypothetical. The technology exists. The data is being collected. The market for it is growing.
What You Can Do Right Now
Review app permissions connected to your watch both on the watch itself and the companion app on your phone. Revoke access for any third-party app that doesn’t need health data to function.
Turn off continuous GPS tracking when you don’t need navigation. Most smartwatches allow location tracking to be set to “during workout only” a simple change that dramatically limits your location data footprint.
Read your health app’s data sharing settings Apple Health, Google Fit, Fitbit, and Samsung Health all have third-party data sharing toggles buried in settings. Most default to sharing. Switch them off.
In the UK and EU, request a copy of all health data your wearable manufacturer holds under GDPR. What you receive will be extensive and eye-opening.
In India, avoid connecting fitness apps to your primary Google or Facebook account this creates a direct bridge between your biometric data and your advertising profile.
Be cautious of insurer “wellness programs” offering discounts for sharing fitness data. The short-term saving may cost you significantly more in the long term if your health metrics are used to adjust your premiums.
The Uncomfortable Truth
Your smartwatch was sold as a health tool. And it is one.
But it is simultaneously one of the most sophisticated personal data collection devices ever strapped to a human body operating 24 hours a day, measuring your most private biological signals, and feeding that information into ecosystems you have no visibility over.
The watch knows when you’re stressed. It knows when you’re sick. It knows when you didn’t sleep.
The question is no longer whether it’s collecting that data.
The question is who else it’s telling.
Your health is personal. Your data should be too.
© AiwalaNews | Global Tech & Privacy Edition | April 2026
