Pace Forge is a marathon training app designed for runners. Users can create customized race plans based on specific course profiles. The app allows users to input fueling windows to optimize their nutrition during training. It provides weather-adjusted pace targets to help users prepare for varying conditions. Users can log run sessions, including details such as distance, time, and pace. The app tracks progress over time, allowing users to review their training history. Users can also set goals for upcoming races. The interface includes options for managing different training plans and adjusting them as needed.