3T is a free lifestyle application that allows you to book and cancel fitness classes with ease. Developed by BRP Systems, this app is compatible with Android 9.0. With 3T, you can book classes, queue for full classes, and see your upcoming bookings. You also have the option to add your bookings to your calendar for easy access.

The app requires you to log in with the same username and password as your web account. Once logged in, you have access to all the features of the app, including booking and canceling classes. The app is easy to navigate and the process of booking a class is straightforward. You can also queue for full classes, which is a great feature for those who want to attend a popular class that is currently full.

Overall, 3T is a great app for anyone who wants to easily book and manage their fitness classes. The app is free and is a great addition to anyone's fitness routine.