Amazon offers Prime members the New Balance BodyTRNr Sports Calorie Counter in Lime, model no. 52569NB, for $30.18 with free shipping. (Non-members can get free shipping with orders of $35 or more; otherwise, shipping adds $5.58.) That's the lowest total price we could find by $25. It features sync functionality with the SmartTRNr fitness app, compatability with most iOS devices, and 100-foot water resistance.