Wearables and Privacy: The Good, the Bad, and the Risky
Ever feel like your smartwatch is quietly judging whether you’ve taken enough steps…or sneaking a peek at your heartbeat while you binge-watch? Wearable tech undeniably handy; tracking everything from steps and sleep to stress, blood oxygen, and even your location.
But here’s the twist: as these devices get smarter, they collect incredibly personal data. Your rhythms, your routines, and your health are up for grabs. That leads to a big question: Who’s watching whom? While wearables offer health benefits and lifestyle nudges, they also pose serious privacy dilemmas.
Let’s explore how much data your wearable really collects, how it could affect you (and not always for the better), and how to use your device with peace of mind.
What Data Do Wearables Collect?
Wearables collect a wide range of mostly health-related data, such as vital signs, physical activities, or even behavior patterns. They can see things like how many steps you’ve taken, how far you’ve traveled, your location, your blood pressure, your body temperature, and so much more.
Common Data Types Collected
Devices that track how much you move, such as counting steps, estimating distance, and calorie burn, are the most common types of devices:
- Heart rate: Monitored continuously through optical sensors or ECG-based technology.
- Sleep patterns: Wearables infer sleep stages and quality by analyzing movement and biometric signals.
- Stress levels: Some devices estimate stress based on heart rate variability and bodily responses.
- Blood oxygen (SpO₂): Optical sensors measure oxygen saturation in the blood to gauge breathing and fitness.
- GPS location: Especially in sports-oriented devices, GPS enables tracking of routes, pace, and distance.
As these devices collect data about your movements and bodily functions, they build comprehensive profiles of your lifestyle and health. They’re tracking when you’re socially active, resting, or potentially unwell.
How Does Wearable Technology Affect Your Privacy?
Having all this health data at your fingertips can help you better understand your body and habits. It can make you more aware, or thus, more likely to take action to become healthier.
However, there are major privacy concerns with wearables and their data. For the last few decades, health information has been personal and private. Many countries have laws that prevent healthcare providers from sharing information classed as “confidential” without patient consent. The best example of this in the U.S. is HIPAA.
Wearables that gather health data run counter to this idea. They pose serious risks for privacy.
- Your sensitive data can be used against you. Employers can ask for access to wearable data, as part of workplace health initiatives. But once they have that data, they can actually use it against you. They could use your health data to adjust your insurance premiums, track where you are during the workday, or even fire you because your data suggests you’re “fatigued” at work too often.
- Location sharing reveals more than you think. One stark example is Strava’s “Global Heatmap,” which inadvertently exposed routes taken around remote military bases, revealing sensitive operational information. This happened because soldiers’ publicly shared workout data showed patterns that could identify locations and even movements.
- Your health data could get hacked. Wearable devices rarely have strong encryption. They also don’t get updated often enough or rely on insecure Bluetooth connections. That makes them ripe for interception by hackers.
- Data could be shared without you knowing. Your data may be shared with third parties, used to nudge your behavior, or fed into opaque algorithms. Often, the companies behind these devices don’t get your consent before or don’t clarify their data policies.
If you want to use wearable technology for the health benefits, that’s fine. But it’s crucial to understand the privacy risks that come with it.
Ethical Issues with Wearable Technology
Despite wearables collecting intimate personal health data, there’s a lack of current laws to address this kind of technology explicitly. The U.S. classifies these devices as “wellness” tools rather than “medical” devices, making much of the data gathered by wearables unprotected by laws like HIPAA.
Regulations such as the Fair Information Practice Principles don’t sufficiently regulate data-gathering activities by wearables either. This lack of legal protection makes wearables more than a privacy issue. It’s an ethical problem as well.
- There’s a lack of transparency with long, convoluted user agreements and data policies. Many don’t bother reading these, which leads to their implicit and uninformed consent.
- Wearables also often collect data and store it in the cloud without users’ knowledge.
- These devices are targets for identity theft and data breaches thanks to the sensitive nature of the data and insecure cloud storage.
- Wearables rely on invisible (“black‑box”) algorithms that may be changed unpredictably.
Existing laws such as the GDPR and HIPAA can provide some protection, but it only extends to wearable use in clinical settings.
Are Smartwatches Safe for Privacy?
When it comes to privacy, not all smartwatches are created equal. Here’s a breakdown of where different brands fall in terms of data protection, and what that means for your privacy.
Some Brands Offer Stronger Privacy Protections
A comprehensive study evaluated 17 leading wearable manufacturers, using a set of 24 privacy and security criteria to generate “Privacy Risk Scores.” Scores are indicated in parentheses (), and lower scores indicate better practices.
Low-risk (better privacy):
- Google (33)
- Apple (35)
- Oura (38)
- Polar (38)
- Withings (39)
- Garmin (41)
These brands have transparent policies, user control features, and robust security measures.
Medium-risk (moderate protection):
- Fitbit (43)
- Ultrahuman (44)
- Samsung (47)
- Fossil (48)
- Coros (50)
- Whoop (50)
- Wahoo (52)
- Suunto (53)
These companies offer some privacy safeguards but still have notable gaps in transparency, control, or security.
High-risk (weakest privacy)
- Huawei (58)
- Wyze (60)
- Xiaomi (Amazfit) (60)
These brands have unclear data policies, limited user control, and inadequate protection measures.
High-Risk Brands Have Major Transparency and Protection Gaps
Recent reporting confirms that brands like Huawei and Xiaomi offer little clarity about data collection, storage, or user rights regarding deletion. It’s alarming, given how much personal data these devices can capture.
Even “Safest” Options Are Not Foolproof
Though brands like Apple and Google are often portrayed as privacy-conscious, they aren’t totally immune from criticism. For example, Apple has faced fines and scrutiny for unexplained data practices involving Siri recordings and location tracking. Strong policies don’t always guarantee perfect execution.
How to Protect Your Privacy on Wearable Devices
TLDR: To use a wearable device safely:
- Adjust privacy settings and permissions
- Use secure credentials and enable 2FA
- Keep software updated
- Limit unnecessary features
- Be cautious with network connections
- Regularly audit third-party app access
- Respect privacy in shared spaces
1. Tweak Privacy Settings
Adjust default permissions on the device, companion app, and associated website. Disable location tracking, social sharing, or other features you don’t use. Check if any data is being shared publicly and restrict access where possible.
2. Read Privacy Policies
Yes, they’re long and confusing, but take the time to read the data policies. Check how the manufacturer and app developers collect data, how it’s used or shared, and how long it’s stored. If parts are unclear, consider reaching out to the company for clarification.
3. Use Strong Passwords + Enable 2FA
Protect your account with a complex, unique password and use a password manager. Whenever possible, enable 2FA to add another layer of security.
4. Turn Off Unnecessary Features and Limit Permissions
Disable features like unnecessary sensors or always-on tracking that you don’t need. Restrict app permissions so apps only access required data. For example, if the app doesn’t need to know what your location is to function, turn off location tracking.
5. Keep Your Device Up to Date
Install firmware and app updates promptly. Manufacturers often fix security flaws through updates, so keeping your device current is one of the easiest yet most effective protections.
6. Be Careful with Wi-Fi and Bluetooth
Use trusted Wi-Fi and avoid public networks when syncing health data. Some research shows that even encrypted Bluetooth traffic can be analyzed to find sensitive actions like recording medical activities.
7. Review Connected Apps and Services
Audit which third-party apps have access to your data through services like Apple Health, Google Fit, Fitbit, or similar. Revoke access for apps you no longer use or trust.
8. Exercise Caution When Sharing in Public
If your wearable has a camera, be mindful of what’s in view before snapping. Avoid wearing the device in private or sensitive settings (restrooms, changing rooms), and always ask before recording others.
Conclusion: Keeping Your Health Data Safe
Your trusty smartwatch or fitness tracker might feel like a friendly companion, but it’s also keeping a close eye on your stats, habits, and routines. From that GPS trail you leave behind to your stress score and body temperature, wearables are quietly (and persistently) collecting data.
Yet, without careful boundaries, that very data can be turned against you. Insurers, employers, or bad actors with improper consent can get access to it.
Stay smart. Enable privacy-friendly settings, limit what you share, pick brands that take your privacy seriously, and don’t let convenience override control. Wearables can be amazing tools for health, habits, and staying on track. But only if we manage the risks with intention and vigilance.
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