The STR Racing Products App is used in conjunction with STR 'App Scales' - the wireless cornerweight scales system. This App enables the user to measure corenerweights of their vehicle and make setup adjustments to the weight distribution of their race vehicle to get the optimum balance/performance. No requirement for any interconnecting cables or any other external devices - other than your smart phone or tablet and the scale pads. View & Save data on: Total weight, individual corner weights,