Legal
Privacy, terms & cookies
Your nights stay yours.
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Last updated: 1 January 2026
What we collect
To write tonight’s plan Nocturne uses the sleep data your phone or wearable records (movement, sound if you allow it, heart rate if your watch shares it), the answers you give in the app, and, only if you connect it, your calendar.
Account details: your email address and a name for the greeting.
Sleep and wind-down data: stages, timings, journal entries.
Device information needed to keep the app running: model, operating system, crash reports.
How we use it
Most processing happens on your phone. What syncs is encrypted, never sold and never used for advertising. We use it to write your plan, improve the soundscapes and answer your emails.
Keeping and deleting
Delete your data from Settings → Privacy and it is gone from our servers within 30 days, backups included. Cancelling a subscription does not delete anything by itself.
Your rights
You can ask us for a copy of your data, to correct it or to delete it at any time. Write to hello@nocturne.sleep; a human replies by breakfast.
Cookies
This website sets no cookies and loads no third-party scripts, fonts or trackers. If you add analytics later, describe them here.
Terms
Nocturne is a wellness app, not a medical device. It does not diagnose or treat any condition. If you snore loudly, stop breathing at night or have struggled to sleep for more than three months, please see a clinician.
Accessibility
We aim for WCAG 2.2 AA. If something on this site or in the app is hard to use, tell us and we will fix it.
Contact
Nocturne Labs Oy, Helsinki, Finland. hello@nocturne.sleep