CardBook is an iPhone application developed by Carl Schader. It is a YuGiOh singles marketplace that offers a range of powerful features to assist collectors and players. With its card detection scanning, users can easily add and search for cards to buy and sell.

One of the standout features of CardBook is its easy buy/sell process. Users can put a card up for sale by simply scanning it and adding it to their inventory. The app automatically creates a cropped picture from the scan, which can be easily priced and listed. Users will receive a text notification when a card is purchased, and as a seller, they will also receive a ready-to-print shipping label on their phone. The Inventory view allows users to manage their inventory and monitor the status of purchases.

CardBook also offers efficient scanning capabilities. Users can scan one card or multiple cards at once, thanks to its active card tracking feature. This makes it convenient for collectors who want to quickly add cards to their inventory.

In addition to its marketplace functionality, CardBook also allows users to save and create decks. Users can save cards they have scanned and add them to any decks they have created. The app also provides a card database for easy searching while inside a deck.

Overall, CardBook is a comprehensive and user-friendly app for YuGiOh collectors and players. Its powerful card detection scanning, convenient buy/sell process, and deck management tools make it a valuable tool for anyone involved in the YuGiOh trading card game.