Wearable monitors used to measure biometric data for medical use; wearable medical monitoring apparatus, namely, wearable biometric sensors in the form of a wristband, chest strap, adhesive skin patch and clip-on sensor, for measuring, storing and transmitting via Bluetooth data relating to heart rate, heart rate variability, pulse rate, blood pressure, blood-oxygen saturation, skin temperature, basal body temperature, core body temperature, respiration rate, sleep stages, sleep duration, and...