GAINSFIRE Workout Tracker is a free iPhone app designed for fitness enthusiasts who want to efficiently log their weight training progress. This user-friendly application allows users to create custom training routines, add exercises from an extensive catalog, and define their own exercises. It provides a straightforward way to track sets, weights, and overall progress, mimicking the experience of a traditional pen and paper workout diary. Furthermore, it includes features for analyzing performance, comparing workouts, and summarizing training sessions.

The app enhances the workout experience by enabling users to set individual rest times, archive routines, and share statistics with trainers or friends. Users can also track body metrics such as weight, body fat, and muscle mass. GAINSFIRE supports data backup and can be accessed on multiple devices. While the app includes a voluntary monthly subscription for additional features, a one-time email registration is required to get started.