Yes, it is required to keep the FreeStyle LibreLink◊ app running in the background. We have not seen a reduction in mobile phone battery life for FreeStyle Libre 2 users receiving real-time glucose readings.
◊ The FreeStyle LibreLink app is only compatible with certain mobile devices and operating systems. Please check our website for more information about device compatibility before using the app. Use of the FreeStyle LibreLink app may require registration with LibreView.