ithlete Train.Recover.Perform is a fitness application designed to help users optimize their health and athletic performance. It uses heart rate variability (HRV), resting heart rate, and other recovery enablers like stress, diet, and sleep to deliver personalized training recommendations. The app requires a 60-second measurement each morning to determine how stressed, recovered, and ready for training the user's body is. This app is suitable for anyone from a recreational runner to an Olympic athlete.

The app provides a personalized training recommendation based on the user's HRV score, which is color-coded. The user can choose to train as normal, train lightly, or take a rest day. The app helps users make the most of every training session, manage recovery, optimize fitness, enjoy guilt-free rest days, avoid overtraining and injury, balance workouts and lifestyle demands, and improve health, fitness, and performance. The app is featured in various publications such as Runner's World, Women's Running, Cycling Weekly, and Men's Fitness. However, it is important to note that the app requires additional hardware, either an ithlete Finger Sensor or a compatible analog or Bluetooth Smart HRM strap, which is not included with the app.