CALM! - Daily Meditation — App Store rankings

TNQ Tech, Co. · Health & Fitness · View on the App Store

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CALM! is a mindfulness app that supports self-care based on heart rate variability (HRV). By placing your finger on the smartphone camera for 30 seconds, the app estimates heart rate variability (HRV) from optical pulse signals. HRV has been internationally studied in relation to stress and… Read the full description on the App Store

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