A sleep tracker can collect more than a nightly duration estimate. Compare the exact device's sensors, app data, sharing, export and deletion controls before connecting an account.
Before connecting a sleep tracker, review which signals the device records, where the app stores them, who can access them and how to export or delete them. Do not assume two products collect the same data because both show a sleep summary.
Data and privacy chart
| Review area | Questions to answer |
|---|---|
| Sensors | Does the device use movement, heart rate, temperature or other signals? |
| Calculated fields | Does the app create sleep phases, duration summaries or personalized insights? |
| Account | Which identifiers, contact details and connected services are associated with the data? |
| Sharing | Can reports be shared with a clinician, coach, employer or third-party app? |
| Retention | How long are device data, app records and backups kept? |
| Controls | Can you download, share, delete or stop syncing data? |
| Regulatory status | Is the device a consumer wellness product or does it have a stated FDA status? Check the exact model. |
Fitbit’s privacy policy lists sleep stages among the data that some devices may collect and says data fields vary by device. Oura’s privacy policy lists heart rate, movement, temperature, sleep duration and sleep phases among product data. These are examples of the details to compare; each company’s terms apply to its own services.
Review the app before connecting
- Find the current privacy policy and product data description.
- List sensor fields, calculated insights and any imported information.
- Review third-party connections and data-sharing permissions.
- Find the export and deletion instructions before creating an account.
- Check whether features depend on a paid membership or account type.
- Confirm how to turn off sharing or stop syncing.
The device’s feature list and privacy policy answer different questions, so read both. If a company shares data with an employer, coach or service provider, review that recipient’s policy as well. For health decisions, speak with a doctor.
For other recovery equipment, read the compression boots checklist and massage gun guide, or browse sleep and recovery tools.
FAQs
Does a sleep tracker store only sleep data?
Not necessarily. Depending on the device and services enabled, it may collect other sensor, account, location or usage information.
Are sleep-stage estimates a medical diagnosis?
Do not assume so. Read the exact product’s regulatory information and speak with a doctor about health questions.
Can I use a sleep tracker without cloud syncing?
That depends on the product and its app. Check whether offline use is supported and what data transfers when syncing resumes.
What should I check in an app subscription?
Compare which features remain available, how the plan renews and whether you can export or delete your data after canceling.
Sources
- Fitbit: Privacy policy, updated February 27, 2026
- Oura: Privacy policy, updated June 15, 2026
- Oura: Export and share data
- FDA: General wellness policy for low-risk devices
To compare regulatory claims on the exact device, see our guide to sleep tracker FDA status.
Common questions
What data can a sleep tracker collect?
Depending on the device, it may record movement, heart rate, temperature, sleep duration or estimated sleep phases. Check the maker's current product details and privacy policy.
Can a sleep tracker share data with another service?
Some products offer integrations or sharing features. Review permissions and the recipient's privacy policy before connecting accounts.
Can I download or delete sleep tracker data?
Controls vary by company and account type. Check the maker's current instructions for exporting data, deleting date ranges and closing an account.
Should I use a tracker to make health decisions?
A consumer product's features and regulatory status do not replace a clinician's advice. Speak with a doctor about health decisions.