How to browse OPDS catalogs using a Pocketbook e-reader?

How do you discover new books to read using your e-reader (not a computer)? I am thinking of books out of the official library.

I was expecting to find an application that support browsing catalogs implementing OPDS.

But I found almost nothing, see for example Awesome OPDS page. Is installing koreader the only option?

Any pointer welcome.

Regards, Matthias