9 Downloadable Software as a Medical Device (SaMD) for diagnosing and treating sleep apnea, ECG, blood oxygen, heart rate; Downloadable Software as a Medical Device (SaMD) for use as a medical instrument for taking a pulse; Software as a Medical Device (SaMD), downloadable, for analyzing heart rate data; Software as a Medical Device (SaMD), downloadable, for detecting interrupted breathing during sleep and alerting the sleeper