Fitbit patented a 'Fit Score' trick that every smartwatch could use

Pictured: fitbit charge 6 and google pixel watch 2.

What you need to know

• Fitbit plans to implement a "Fit score" that will tell you how well your wearable is fitted to your wrist. 
• Using pressure sensors, it'll tell you whether the biometric signal quality is high enough to deliver accurate heart rate results. 
• If the Fitbit detects a poor fit, it can "calibrate" blood oxygen data to take this into account. 
• Fitbit patented the ability to add "pressure sensor integration" to its wearables on December 26.