Pathize is a free iPhone application designed for individuals managing energy-limiting chronic conditions such as ME/CFS and POTS. The app seamlessly integrates with Apple Watch to monitor physical exertion in real time, offering users immediate feedback to prevent overexertion. This functionality is particularly beneficial for those who need to carefully manage their energy levels throughout the day.

In addition to tracking exertion, Pathize enables users to log various activities alongside their symptoms, medications, and episodes of Post-Exertional Malaise. This correlation helps in building a detailed overview of one's health status. It is important to note that while Pathize provides valuable tools for tracking health, it is intended solely for informational purposes and does not replace professional medical advice.