There are a number of devices on the market that can measure the user’s heart rate. One of the most notable brands in fitness tracking is Fitbit. Users looking for the most accurate heart rate sensor for a wrist-based wearable may gravitate toward Fitbit, not just because of its dedication to personal health, but also its price. However, a 2018 study presented by the Heart Rhythm Society noted findings that suggested quite the opposite.
The study compared results from the Apple Watch Series 2, Samsung Galaxy Gear S3, and the Fitbit Charge 2 across 51 patients with histories of paroxysmal supraventricular tachycardia (PSVT), or abnormal heart rhythms. Patients were randomly assigned two of the three devices, which they wore on each wrist, and readings were recorded at a baseline and during elevated PSVT episodes.
After the study, researchers found that both the Apple Watch Series 2 and Samsung Galaxy Gear S3 achieved a 100% accurate heart rate within 10 bpm. The Fitbit, on the other hand, achieved only 88%.
