Does anybody know about whether other companies have done this,...

Does anybody know about whether other companies have done this, i.e. can measure heart rate without any strap or additional wearable?


For the first time, Vector enables users to collect heart rate data without additional wearable products. Collecting data directly from Vector’s sensor-embedded vest, the technology removes the need for a heart rate strap or additional hardware. This improves athlete buy-in and provides a robust solution for capturing physiological information alongside movement data.

Does Statsports do it? Also, how accurate relative to one another?