The MLB The Show Companion App is a free Android application developed by PlayStation Mobile Inc. that provides a complementary experience for MLB The Show. This app is a comprehensive tool for baseball fans who want to keep an eye on their Community Marketplace transactions on the go. It allows users to search cards, create orders, manage their watchlist, and view card details.

Moreover, the app enables users to manage their squad, lineup, Captains, batting order, and rotation. It also offers a Face Scan feature that allows users to create their Ballplayer. Additionally, the app tracks user's Program progress in XP Reward Path and Team Affinity. Users can add items to Collections and Exchanges and can check the latest news, game updates, roster updates, and live content. The app also sends notifications when a user's Community Market orders update or when their friend pulls a Diamond.

Overall, the MLB The Show Companion App is an excellent tool for baseball fans who want to keep track of their transactions and manage their squad on the go.