TINA - Fitness Instructor's APP is a free Android application developed by Passion Fitness that aims to revolutionize the way fitness instructors interact with their clients. The app provides a platform for instructors to create live and online sessions, stream live sessions through the app and smartphone camera, monitor clients that join the live session, stream live sessions through RTMP protocol, and share live session web players on social networks.

TINA also offers a web portal where fitness fans can register and pay to attend live sessions scheduled by instructors. Fitness instructors can also find class replacements with just one swipe, and the app notifies similar instructors in the area who can replace them. TINA has added gamification and community functions that allow instructors to see all the instructors with a community view ranked based on the number of points they have.

Overall, TINA - Fitness Instructor's APP is an innovative and useful tool for fitness instructors looking to monetize their classes and interact with their clients in new ways. The app is easy to use and provides a stress-free way to find class replacements.