An interactive teaching lab, in the browser, for learning how accelerometer signals are processed: record or load a walk, filter it, look at its spectrum, and compare step detectors side by side. A teaching tool, not a validated gait instrument.
An open-source bridge that reads vital signs from standard Bluetooth health services and serves them as US Core FHIR R4 Observations through a local, read-only API. Research and education only; not a medical device.