Lisa Eadicicco/Insider You can add apps to your Apple Watch directly through the App Store, or through your iPhone's Watch app. Your Apple Watch comes with an App Store that you can use to add thousands of apps. The Watch app lets you add apps to your Apple Watch that you've already installed on your iPhone. . Apple Watches come preloaded with a library of apps, including Activity, which tracks your exercise goals; mindfulness app Breathe; a Calendar that you can track events, holidays, and meetings on, and more. Related These preloaded apps are great for getting started, but there are also thousands of third-party apps you can add to your Apple Watch — just like you do on your iPhone.