The Apple Watch Series 3 is recommended for budget-conscious users who are new to smartwatches or those who need a basic level of connectivity and fitness tracking. It is also suitable for individuals with compatible older iPhones who want to experience a smartwatch without spending on the latest models.
HeartRate.Tech's answer
Breathing exercises
Very nice, easy to operate. Doesn't let your finger burn from camera flash like other apps. Does quick BP readings when access to appropriate medical equipment is constrained.
Using it on my iPhone (but it has also Android version, I know) for almost 1 year. In my experience, this app is quite accurate. I tested it with my beurer pulseoximeter while struggling with covid and measurements were just like the same, so I was impressed.
Cardiogram: HR Monitoring - Accurately measure and monitor your heart rate over the whole day.
Apple Watch - Apple Watch build with NextJS (ReactJS) & TailwindCSSGitHub repo: https://github.com/VishwaGauravIn/apple-watch
HeartRateMonitor - Android based heart rate monitor which uses the camera and its flash to determine the users heart rate in beats per minute.
Apple Watch NikeLab - A limited-edition Apple Watch NikeLab
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Apple Watch Series - Full screen ahead.