Save money with Tangoe rTEM. Our free app measures your data and roaming usage in real-time, and then compares it with your telecom plan. You will receive alarms on your mobile device as you use up your carrier plan. By upgrading to our business solution, Tangoe rTEM Enterprise, you will benefit from our added security features and bill shock prevention for your corporate mobile devices. Roaming detection is not supported on CDMA devices.Tangoe rTEM requires multitasking and will therefore not function on some older devices.Continued use of GPS running in the background can dramatically decrease battery life.