The only way to kill this app is to shut the phone down. You can't switch out of - you can stop the video from playing by pushing the side button but that's it. The launch screen stays there. You can move around in the app to various options and settings but that's it. You can't get out of the app, can't load the app switcher, can't go back home. Yes, it works fine on my iPhone 7 and iPhone with IOS 11. You can kill the app by using the home button. There is no recent update on the App store.