Fitbit has released a new update for its wearables OS, and adds some big new health and smart features to its line-up of devices.

Fitbit OS 5.1 is the latest update and adds functionality to Fitbit Sense and Fitbit Versa 3.

This feature is available now for US users, and will be available in other territories by end of 2021, according to Fitbit.

In our reviews, we lauded the new health features, especially the EDA stress sensor, temperature sensor and ECG on the Fitbit Sense.