Yes, I use the official API, but there is no special treatment to circumvent advertisements. All I did was to ensure that it can be played in the background, but inexplicably it is also free of ads in Sling.
The Android version is currently available on the Google Play, and the iOS version has been submitted for review and is expected to be available soon :D
Hi HN：
This app is a practice program for me and my seniors this semester. We've spent two months researching and developing, so we hope you'll give us your valuable advice.
-With Sling you can listen to all the music you want for free! You can even play YouTube videos in the background for free.
-Your accounts across various streaming media platforms can be linked to the app, to allow you to listen to a compilation of all your favorite music. Sling currently supports Spotify and Apple Music.