Several stock apps will gain 3D Touch support in iOS 9.3.
MacRumors reports: "On the iPhone 6s and 6s Plus, there are new 3D Touch Quick Actions for several of the stock apps, including Weather, Settings, Compass, and Health. Weather's Quick Actions allow you to see the weather at your current location or for saved locations in the app. Settings includes useful shortcuts for accessing Bluetooth, Wi-Fi, Battery, and Wallpaper options. Health's Quick Actions provide access to the Medical ID or a user's dashboard, while Compass now features options to open directly to the compass or the level."