The heart rate tracking function that was not seen by vendors a few years ago has now become the trend of the wearable industry.

When Fitbit's first product was launched in 2009, it was called the first wearable wireless fitness device for the mass consumer market. The clip-on Fitbit adds software elements to the basic step-by-step feature, allowing users to view data progress through the Fitbit website or mobile app.

Perhaps, more notably, Fitbit – and its competitors – did not introduce heart rate monitoring. Generally speaking, only athletes or people with heart health concerns need that function.

Today, five years later, Fitbit is betting on ongoing heart rate monitoring to increase the value of its consumer health products. The company plans to launch two wearables early next year that will support heart rate data reading through the wrist. Of course, Fitbit isn't the only company involved in heart rate monitoring: Jawbone, Intel, Motorola, Samsung, LG Electronics, Microsoft and Apple all plan or have launched wearable technology products with heart rate sensors, and the list continues to expand.

In the opinion of industry experts, manufacturers have added heart rate sensors to new activity tracking devices and smart watches, highlighting the importance of heart rate data in comprehensive assessment of personal health.

The strategy behind the manufacturer's ability to provide heart rate tracking is obvious.

Liz Dickinson, founder and CEO of Mio, said that on the one hand, the addition of more sensors may help to increase the appeal of wearables, which are a high-deprecation category.

People who love exercise need heart rate data.

Travis Bogard, vice president of product management and strategy at Jawbone, points out that another driver of this heart rate tracking trend is that related sensors are easier to obtain. Another wearer, Misfit executives, added that the sensors are also cheap, and the cost of a single sensor can range from $1 to $2; adding them also allows manufacturers to increase product prices and gain more profit margins. .

Jawbone's heart rate tracking method is different from other wearable device companies. Its UP3 bracelet has a built-in bioelectrical impedance sensor, while the Fitbit Surge, Microsoft Band, Basis Peak health watch and the Apple Watch, which is not yet on the market, use the optical heart rate sensor.

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