
Applications that handle sensitive health information are now widespread. Beyond those provided by my healthcare providers—which must follow HIPAA regulations—I’ve utilized apps that monitor my weight, fitness routines, mental well-being, menstrual cycles, and more. Often, these apps share or sell your data, and it’s connected to you—even if you register with a fake email.
How does this happen? For starters, if you reuse the same fake email across platforms, it still identifies you, even if you consider it anonymous. When companies exchange data, they frequently aim to link identities, matching whatever information they possess. Even if you use unique disposable email addresses for each app, other identifiers can still be used to track you.
However, even a constant stream of fake emails and phone numbers won’t ensure your privacy. A recent study on depression and smoking cessation apps for both Android and iOS revealed that some apps utilize device identifiers, which are linked to your actual phone. Another study on Android health apps discovered that 45% associate device identifiers with your data, and many transmit this information without encryption.
Currently, there’s no effective solution to this issue. Using fake emails might offer some minor protection, or at least they likely don’t cause harm. You can reset your phone’s advertising identifier periodically, but not all identifiers can be reset. While you can update your email or phone number in your health app, they may retain previously entered data instead of deleting it. For now, the best approach is to use health-related apps cautiously and remain aware of the risks.
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