Software as a Medical Device (SaMD), downloadable, for measuring and displaying the electrical signal produced by the heart; Recorded Software as a Medical Device (SaMD) for use as a medical instrument for vital sign measurements; Software as a Medical Device (SaMD), downloadable, for analyzing heart rate data; Software as a Medical Device (SaMD), downloadable, for use as a medical instrument for vital sign measurements; Software as a Medical Device (SaMD), downloadable, for detecting interru...