Lemfo via Amazon offers its Lemfo Men's LF19 Digital Smartwatch for $28.99. Coupon code "DEALLF19" cuts that to $18.84. With free shipping, that's $40 off list and the lowest price we could find by $2, although we saw it for $2 less three weeks ago. It's compatible with iOS and Android and features activity, distance, and calorie tracking, app notifications, and water resistance to 165 feet.