Somn

Privacy-first Android sleep tracker that uses just the phone's accelerometer, no wearable needed.

Mobile appfree

Somn is a free, open-source, privacy-first Android sleep tracker that uses only the phone's accelerometer to classify sleep stages overnight with age-calibrated algorithms, keeping all data on-device with no subscription or cloud account. It's aimed at Android users who want sleep tracking without buying a wearable or paying a subscription, and who want their sleep data to stay private.

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