Yes. The Libre app* must be installed on your iPhone. In addition, the Libre watch app† is a tethered app that works when your Apple Watch is in range with your sensor and iPhone.
*The FreeStyle Libre systems apps are only compatible with certain mobile devices and operating systems. Please check the support section of our website for more information about device compatibility before using the apps. Use of the FreeStyle Libre systems apps may require registration with LibreView.
†The Libre app for smartwatches is only compatible with certain devices and operating systems. Please check our website for more information about device compatibility before using the app. Use of the Libre app may require registration with LibreView. The Libre app for smartwatches should not be used to make treatment decisions. Please follow the Libre app instructions on your smartphone.