Newegg offers the Samsung S Health Activity Tracker, model no. EI-AN900AZESTA, for $20. This $20 mail-in rebate drops that to $0. With free shipping, that's $2 under our mention from three weeks ago and the lowest total price we've seen. (It's a current low by $23.) It features call and text message notification, step and calorie tracking, and sleep monitoring. The tracker syncs with the S Health App. It's compatible with Samsung devices with Android 4.3 or higher. Deal ends February 1.