Web Opac: 1000 libraries is a free Android app created by rami.io GmbH that allows easy access to over 1,000 public and academic libraries. The app provides users with a convenient way to access library catalogs and user accounts of over 500 public libraries, most of which are in German-speaking countries.

The app offers many features to help users search for books, including the ability to search the catalog of your library, a watchlist for books, and a search for ISBN with a barcode scanner. Additionally, in some libraries, the app provides users with the ability to view lent media (also with multiple accounts), prolong lent books, cancel reservations, reserve books, and receive notifications when books need to be returned (not guaranteed).