Thanks for your purchase, and we’re sorry for the confusion!
Glider cannot stream songs you’ve downloaded from the subscription based Apple Music service, as those songs are DRM protected. While it is technically possible for Glider to locate and play these songs directly through your iOS device, that feature is not currently planned for development. Any Apple Music songs that you’ve either purchased or synced using iTunes should be fully available in Glider for local playback or streaming.
Our App Store description uses the term ‘local’ to try and explain this, but obviously there’s still confusion so we’re going to add an explicit disclaimer in the next release to make it clear that Glider cannot play subscription based content in any way.
If you feel the app is not doing what you paid for, please request a refund from Apple within 90 days: https://reportaproblem.apple.com/
Sorry again, and please let me know if you have any other questions or concerns.