This app is part of an MIT research project studying if we can improve deep sleep with gentle sounds and vibrations in sleep. If you have not already signed up for the study, you will need to do so at the link below before you can use the app.
You are eligible to participate in the study if you are 18 years or older, live in the United States, and have a Samsung Galaxy Watch 4 or later.
Updated on
Oct 23, 2025
Education
Data safety
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Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
Health and fitness and Device or other IDs
No data collected
Learn more about how developers declare collection