Hi. Depends on the iOs Version of your iPhone. In the german description are more informations, I try to translate: The Fossil Q Marshal is operaded with Android Wear 2.0 and works with Smartphones with Operating system Android 4.3+ or iOs 9+. Functions may vary on different platforms. This means that it works with iOs Version 9 or higher and under "externe Links" is a link to the iOs-app in the AppleStore.