Binder is an app for collectors of Pokémon cards. The app allows you to catalogue all of your cards. You can also tag cards that you want, as well as cards that you have available to trade away.
-- Please note that keeping a catalogue of your cards requires creating an account and an in-app purchase of $0.99. Creating an account requires you to provide your name and email address. If you choose not to create an account or pay for the in-app purchase, you will still be able to browse cards.
-- Disclaimer: TCG Trades is not affiliated with, sponsored by, endorsed by, or in any other way associated with Pokémon or the Pokémon Company International, Inc. All card images and Pokémon characters are property of the Pokémon Company International.