Because all brain injuries are different, so is concussion recovery. Most people with mild injuries recover fully, but it can take time. Some symptoms can last for days, weeks, or longer. In general, recovery is slower in older persons. Also, persons who have had a concussion in the past may find that it takes longer to recover from their current injury.
WatchOS is the operating system (OS) that runs on every Apple Watch - basically, the watch equivalent of iOS, which you'll find on iPhones and iPads. Operating systems essentially sit between the hardware - in this case, the Apple Watch - and the apps that you download. Everything that you do on your Watch is possible because of WatchOS. It's the menus that you scroll through, to load up apps and tweak the Watch's settings. It's the clock faces and other built-in features that you see when you turn your Watch on.
Apple unveiled the newest version of its Apple Watch software, WatchOS 4, at its annual developer's conference on Monday. The new software will have improved fitness tracking, new and more customizable watch faces, better Siri integration, and helpful updates to the Apple Music app. Here are some of the major updates: Three new watch faces: Toy Story faces, Kaleidoscope Face, and Siri Face.