Smokers in the US, Canada, France, Israel and Turkey are trialing a “quit smoking” app called SmokeBeat from Israel’s Somatix. It detects smoking from hand-to-mouth gestures picked up by sensors built into smartwatches and wristbands and provides analysis and support via your smartphone.
https://www.israel21c.org/pairing-smartwatch-sensors-with-psychology-to-quit-smoking/