The short version
Landmark Sleep reads your overnight data from Apple Health on your iPhone. The app has no account, no Landmark server and no analytics. Your health readings are not sent to us.
Who this policy is from
This policy describes the Landmark Sleep iOS app and this website. It is published by Smashing Labs LLC. Questions can be sent to support@landmarkhabits.com.
What the app reads
With your permission, Landmark Sleep reads sleep analysis, heart rate, heart rate variability (SDNN), blood oxygen, respiratory rate, resting heart rate, sleeping wrist temperature and breathing disturbances from Apple Health. It uses these readings to show last night, compare values with up to 30 earlier nights, and draw the stage timeline. It reads up to 31 nights from a 45-day lookback.
The app requests read access only. It never writes to Apple Health. You choose access by data type and can revoke it in Apple Health at any time.
Where your data stays
The readings and calculations stay on your iPhone. Landmark Sleep has no account or server that receives them. It does not use third-party analytics or advertising SDKs in the app. We do not sell health data or use it for advertising.
Deleting the app removes its local app data. Your original Apple Health records remain under your control in the Health app. Revoking permission stops future reads; deleting the app removes the app's own data.
This website and support email
This website is static and has no analytics, cookies or forms. A hosting provider may keep ordinary request logs, including IP addresses, for security and operation once this site is hosted. The website never receives your Apple Health readings.
If you email support, we receive your address and whatever you choose to include. We use that message to answer you.
Changes
We will update this page when the app or site's data practices change. Contact support@landmarkhabits.com with privacy questions.