How does Apple's mobile phone measure the heart rate through the camera?

I believe everyone knows that there is a health App in Apple's own App, and there are many parameters that ordinary people can't measure at all, but recently I found a free APP that can measure the heart rate and synchronize it directly to the health app. This free software Runtastic Heart Rate allows us to measure heart rate with iphone. As shown in the figure, there are health app and Runtastic heart rate app respectively.

Turn on step reading mode

Tool materials:

Iphone (text version is iphone6)

Runtastic heart rate (downloaded from App Store)

operational approach

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As shown in the figure, open the Runtastic heart rate and you can see the tips of the measurement method. Gently place your index finger on the camera and time light on the back of your phone to make sure they are completely covered. Hold this position until the end of the test.

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The picture shows the interface of the tested mobile phone, and the measuring time is about 15 seconds. The following is the measurement curve of heart rate.

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After the measurement, you can choose your own measurement state. From left to right, it is the default state-sleep state-before exercise-after exercise-excited state. You can also record your mood and record the overall state conveniently.

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You can clearly see the heart rate of each time period in the historical records, which is very convenient for people who like fitness.

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Using the delete function can help analyze our historical measurement types.

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How to synchronize the data of Runtastic heart rate to Health Health App? Select Apple Health in the settings, as shown in the figure.

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Choose to share your data with Apple Health***, as shown in the figure.

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Open Apple Health and select Health Data-Main Signs, as shown in the figure.

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As you can see in the heart rate, the measurement results in Runtastic heart rate have been synchronized.

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In addition, there is another parameter in Runtastic heart rate, which refers to the heart rate measured 2 minutes after waking up in the morning. If you do endurance exercise, your resting heart rate will decrease with time.

Special tips

Runtastic Heart Rate Free Edition has a relatively sound function and is not particularly needed. You don't need to buy a Pro version.