HeartIn – Heart Rate & HRV Tracker Take charge of your well-being with HeartIn, your all-in-one heart and stress tracking app. Using your phone’s camera and flash, HeartIn helps you estimate your heart rate and HRV (Heart Rate Variability) in seconds — giving you a better understanding of your body and lifestyle balance. Key Features • Quick HR & HRV Checks Measure your heart rate and HRV anytime, anywhere. Just place your fingertip over your camera — no extra devices needed. • Personalized Heart Score After each check, get your Heart Score, showing how your readings compare to typical wellness ranges for your age group. • HRV Graphs & Trends Track your HRV over time through clear, easy-to-read charts that reflect your stress levels, recovery, and energy balance. • Stress & Energy Insights See how sleep, activity, and habits affect your body. HeartIn tran...