HOTWORX is a free iPhone application developed by Planet Beach Franchising Corporation, designed for members of HOTWORX Studio facilities. The app aims to encourage users to track their calorie burn during their 40-minute HOTWORX workout sessions and the 1-hour after-burn. In total, the session time captures the calories burned for a total of 100 minutes, providing users with an accurate representation of their total calorie burn.

The app integrates with the Health app, making it easy for users to track their fitness goals and progress. The user interface is simple and easy to navigate, allowing users to quickly log their workout sessions and view their progress over time. HOTWORX is an excellent choice for those looking for a fitness app that focuses on tracking calorie burn during a HOTWORX workout.