하루 1루 is a dedicated app for KBO baseball fans, designed to help users document their game experiences. The app allows users to record the date of their stadium visits, game details, and personal notes, effectively creating a personalized baseball diary. Additionally, it offers features to manage expenditures related to game attendance, including tickets, food, and merchandise, making it easier to keep track of spending.

The app also includes an achievement system that rewards users for their attendance and activities, providing a motivational aspect to using the app. Users can view statistics on their attendance patterns, such as the number of games attended and favorite teams. With a simple login via Google or Kakao, users can securely save their records, making 하루 1루 a comprehensive tool for any baseball enthusiast looking to organize their game experiences.