Blueberry uses optical sensing (fNIRS - functional near-infrared spectroscopy) to understand changes in relative blood flow. We pair this with environment and mobile phone contextual sensing. Together, these can enable deeper insight into how, why, and when your mind or body changes during the day. 

We process fNIRS data in real-time to extract fundamental signal features such as (1) hemodynamic response (2) pulse rate variability (3) heart rate and (4) additional motion artifacts visible in the relative blood flow signal.

If you are interested in using Blueberry sensing for research please reach out directly to and we will do the best we can to support you.