YGO Card Finder is a free Android app developed by Jonathan Castillo that offers a complete list of all existing Yu-Gi-Oh! trading cards and sets, along with their information and prices. The app is designed to help players and collectors keep track of their collections and make informed decisions when buying or selling cards.

The app uses the internet to fetch the latest prices, images, and card information from the APIs of YGOPRODeck and Yugiohprices. It also features an intuitive user interface that allows users to search for cards by name, set, or attribute. With YGO Card Finder, Yu-Gi-Oh! fans can easily access all the information they need about their favorite trading cards in one place.