Dell Home offers the Polar M400 Bluetooth Activity Tracker in Black, model no. 90051090, for $199.99. Coupon code "$D42$7HM9XKR20" cuts it to $129.99. With free shipping, that's the lowest total price we could find by $22. It's compatible with iOS and Android and tracks distance, speed, calories burned, activity, sleep activity, and steps taken. Features include time display, alarm, stopwatch, and purported battery life of up to 8 hours.