The t:simulator™ App is a free application that allows you to use the Tandem Diabetes Care t:slim X2™ Insulin Pump with your smartphone. The app is compatible with both Android and iOS devices and allows you to explore the simple touchscreen interface of the t:slim X2™ Insulin Pump. It is designed to help you learn how to manage your diabetes and to help you prepare for the pump's first use. It is not intended for use in the diagnosis of diabetes or the treatment of diabetes. It is not designed to be used with a body surface area measurement device.