プロ野球応援歌 is a free Android app developed by wide app. As a lifestyle app in the sports category, it offers a comprehensive collection of cheers for active Japanese professional baseball players. With this app, users can not only listen to the cheers but also view the lyrics and player stats, making it a must-have companion for baseball fans.

The app allows users to tap on a player's name to start playing their cheer. It is recommended to adjust the volume beforehand for a seamless experience. In cases where a player has recently joined a team and does not yet have a specific cheer, a generic cheer will be played instead.

Please note that if the app's data does not update after updating the app, it is advised to uninstall and reinstall the app.