Trust & Transparency
How we care for your data.
How Nightfall Sleep, Inc. collects, uses, and protects your information.
Last updated: March 2, 2026
Privacy Policy
What We Collect
We collect your account info (name, email, date of birth, sex) and sleep data from your connected wearable — sleep stages, heart rate, HRV, respiratory rate, temperature, and movement. We also collect basic device and usage analytics.
How We Use It
Your data powers your sleep scores, personalized plans, peer comparisons, and health insights. If you opt into Nightfall Rx, your clinician sees your sleep data to guide care. We use aggregated, de-identified data to improve our models.
What We Never Do
We never sell your sleep data. Not to advertisers. Not to data brokers. Not to anyone. This is a founding principle.
Sharing
We share data only when:
You opt into Nightfall Rx (shared with your clinician under clinical consent)
Our infrastructure providers need it to run the service (under strict agreements)
The law requires it — and we’ll tell you unless legally prevented
Your Rights
Delete your data anytime via Settings → Privacy & Data or by emailing privacy@nightfall.com. Deletion completes within 30 days.
Children
Nightfall is for users 18+. We don't knowingly collect data from minors.
Changes & Contact
30 days' notice before material changes. Questions? privacy@nightfall.com.