For Android, Sleep as Android has a contactless option (they emit ultrasonic audio and then sense the changes in the audio field): https://play.google.com/store

For Android, Sleep as Android has a contactless option (they emit ultrasonic audio and then sense the changes in the audio field): https://play.google.com/store/apps/details?id=com.urbandroid.sleep https://play.google.com/store/apps/details?id=com.urbandroid...