Editor's Notes & Price Research
This fitness tracker/smartwatch is compatible w/ Android devices 4.4+ (KitKat), Windows Phone 8.1+, and iOS 8.1.2+. Your Dell eGift card will be sent via email within 10-20 days after invoice. -johnny_miller
Cheapest I've seen if you count the gift card.
Link below is for the large band but same deal also exists for the medium and small size.
Microsoft Band 2 tracks your heart rate, exercise, calorie burn, and sleep quality, and keeps you connected with email, text, and calendar alerts. It features 11 sensors, including a GPS, UV monitor, and barometer. And with the power of Microsoft Health, you have the tools you need to reach your goals.