The PLU Codes Database is a free educational application designed for iPhone users, serving as both a reference guide and a learning tool for identifying PLU codes associated with various produce items. It is particularly useful for checkout and management staff in supermarkets and grocery stores, providing essential information at their fingertips without any in-app purchases.

Key features of the app include the ability to look up products by name or PLU code, as well as engaging quizzes to test knowledge. Users can participate in a code quiz that requires typing in the correct code for a displayed product image, or a picture quiz where they must select the correct product from a set of options based on a given PLU code. The app contains a database of 1425 codes, with quizzes and images focusing on the 100 most common items.