On the whole, iOS 15 feels like a continuation of iOS 14, which felt like a continuation of iOS 13. I've been testing iOS 15's new features, and everything from bigger additions like FaceTime call web links for friends on Android and Windows to smaller changes like pinning conversations to the top of the Messages app has improved my iPhone - without disrupting my day. The new operating system was in public beta for months undergoing a variety of tweaks leading to its final release.
Whether you're getting Apple's new iPhone 13 or holding onto a 6-year-old iPhone 6S, iOS 15 is now available for download.