If you relied on the Xbox 360’s Smartglass features, you may need to change your gaming workflow. Microsoft is about to discontinue support for the Xbox 360 apps on all platforms including Windows, iOS and Android.
On May 18, 2018, the Xbox 360 SmartGlass apps for iOS, Android, Windows Phone 7, Windows Phone 8, Windows 10 Mobile, Windows 8, and Windows 10 will be retired. Support for the app and content are no longer being offered.
Instead, customers are encouraged to use the Xbox app for iOS, Android, Windows 10 Mobile, or Windows 10, or use services on http://www.xbox.com or on the Xbox 360 console itself.
If you still use an Xbox 360, you should consider upgrading to the newer, more superior Xbox One to retain Smartglass like features, else get used to operating without it.