Big Price drop. Amazon has a Fitbit Sense Advanced Smartwatch Sale, $139.95 -  Free Shipping. Tax in most areas. Expires soon. Rated 4.4 out of 5 stars.

• In 3 colors

• EDA Scan app detects electrodermal activity which may indicate your body's response to stress and a built-in skin temperature sensor logs yours each night so you can see when it varies
• Assess your heart for atrial fibrillation –a heart rhythm irregularity- and easily share results with your doctor (The Fitbit ECG app is only available in select countries. Not intended for use by people under 22 years old.
• Operating temperature: 14° to 113°F
• An on-wrist skin temperature sensor tracks yours each night so you can see how it varies. You can also see your nightly blood oxygen levels at a glance with our collection of clock faces. Maximum operating altitude: 28,000ft

It accurately tracks all-day stats like steps taken, distance traveled, calories burned, floors climbed, active minutes. Lets you see daily fitness stats and the time of day on the bright LED display.

• Free 30 day trial to Amazon Prime for Free Two-Day Shipping.
• Students get a free 6 month Amazon Prime Trial