More songs online than with the premium app

[-rob]

Hi there,

sorry, I didn't find this topic in the support.

I have the spotify premium, and I'm surprised because I can find some tracks online, even if log out, that I cannot find on the app with the premium login. For instance this song (just one example) https://play.spotify.com/track/2WQRRw5LxvsnwQWk8bfOOU - I can playit from the browser, even if I don't log in, and I cannot find it on the app. Why?

It looks to me that the app (either computer, smartphone) comes with less songs than the the brower version.

Thank you!

Bob