On izneo’s website:
Make sure that you are logged in with your subscriber account (the welcome menu will read “Subscription news.”
You’ll find the albums that are part of the subscription offer on the “Subscription news” page, in the Subscription catalog, or in your library under “Subscription.”
All of the subscription albums have a green “Subscription” band across the cover.
You’ll also notice that the subscription albums’ individual description pages contain the text “Included in the 9€99/month subscription offer.”
Via izneo’s application for Android or iOS:
Make sure that you are logged in with your subscriber account (you should see a button that you can switch from “Subscription catalog” to “Entire catalog.”
You will then find the albums in “My space” or “Library,” then “Subscription.”
When the subscription switch is enabled, you will also be able to flip through the Latest news / Catalog / Search pages.