Paid for versa 3 with premium to keep track of oxygen saturation readings. Readings are never and have never been consistant. Too many times no reading. Uninstalling/installing is sonething that helps occasionally but really shouldn't need to be done. Somewhere there is a failure with software that hasn't been fixed for years. Very frustrating and disappointing. This happens way too often. Also occured with previous fitbit. Not an Apple fan but leaning that way to get a tracker that works.
