Aupalla via Amazon offers its Aupalla 21BP Blood Pressure and Heart Rate Activity Tracker in several colors (Black pictured) for $29.99. Coupon code "TOPBJ4TZ" cuts it to $19.49. With free shipping, that's a buck under our mention from three weeks ago, $11 off, and the lowest price we've seen. It tracks systolic and diastolic blood pressure, continuous heart rate, sleep, steps, calories, and distance. Features include Bluetooth 4.0, smart notifications, GPS tracking (when connected to your smartphone), and a clock function. Deal ends March 31.