Microsoft said users of the Groove Music iOS app will be able to continue using music purchased through the service and stored on OneDrive, but streaming, buying, and downloading through the app will end for good on December 31.
Groove Music App Microsoft
On December 1, 2018, the Groove Music iOS and Android apps were retired. Your personal music files will continue to be available in OneDrive. You can keep listening to those files, and your playlists, by downloading them and using the Windows 10 Groove Music apps on PC, Xbox, or Windows Phone.
What's happening to the Groove Music iOS and Android apps?
The Groove Music iOS and Android apps were retired on December 1, 2018. After that date, the apps won't work and should be uninstalled.
Microsoft Groove Music For Mac Osx
What will happen to my music?
Your personal music files will still be available on OneDrive. You can access OneDrive online or through the OneDrive app on any supported device. To keep playing your music and playlists in Groove, download these files and use the Windows 10 Groove Music apps on PC, Xbox, or Windows Phone.
How can I play my OneDrive music on my iOS or Android device?
Microsoft Groove Music For Android
Download your OneDrive music to your PC. Get more info about Groove and OneDrive.
Play your music through the OneDrive app. Get more info about Groove and OneDrive.
Play your music with Google Play Music or iTunes Match.