The HGA app, developed by House of Grappling Arts, is a streamlined tool for managing Brazilian Jiu-Jitsu (BJJ) schools, students, and classes. It offers a user-friendly interface to track student profiles, including usernames and emails, and provides options for password resets and language settings. Key features include a QR code system for easy check-ins, a calendar for scheduling classes, and a login system to secure access. Designed for BJJ instructors and gym owners, HGA simplifies administrative tasks, allowing more focus on training and community building within the martial arts space.