Xbox SmartGlass is an Xbox One controller app that turns your phone or tablet into a remote control for your Xbox One (or Xbox 360). This is a great way to interact with your Xbox One if you already have your phone nearby while watching a movie or TV show on your console.
Xbox SmartGlass: What You Need to Know
The SmartGlass app is also useful when playing games, as it allows you to activate the game DVR feature on Xbox One. Additionally, many games use the Xbox 360 version to display important information on the second screen, such as maps.
In addition to controlling your console through your phone, the app also provides easy access to your Xbox friends list, achievements and gamerscore, TV guides, and more.
SmartGlass is available for both phones and tablets and works on Android, iOS and Windows, so virtually anyone can use it.