Lemfo via Amazon offers its Lemfo Men's LF19 Digital Smartwatch for $28.99. Coupon code "6T4UEX3P" cuts that to $18.84. With free shipping, that's the lowest price we could find by $8, although we saw it for $2 less in November. It's compatible with iOS and Android and features activity, distance, and calorie tracking, app notifications, and water resistance to 165 feet. Deal ends January 15.