I am using the Xcode 8 and Swift 3. My Iphone is ios9 I tried to RUN my app on my Iphone and it couldn't run. It said it is just for IOS10.2. I need some help on " how to run my app on IOS 8 to the latest IOS ? "
Check development target in Project Target Settings Panel. if it is not on 8.0 then make it and run your app. it will run as well on ios 8 devices.