Ronten via Amazon offers Prime members the Ronten R2 Smart Bluetooth Fitness and Activity Tracker in Blue or Purple or Pink for $22.99. Coupon code "JBP3GBT7" cuts it to $18.39. With free shipping, that's tied with our mention from lat month, $58 off, and the lowest price we could find. It tracks steps, calories, distance, and sleep and features a 0.86" OLED touchscreen display, Bluetooth 4.0, smart notifications, water-resistance, TPE band, and rechargeable lithium battery with up to seven days of use per charge.

Note: It's also available in Pink or Teal for $20.79 with free shipping (without Prime) via the above coupon.