Fitness is a free lifestyle application available exclusively on iPhone and iPod Touch. The app, developed by Gaivoronski Andrei Vyacheslavovich IP, offers a range of features to help users track and improve their health and fitness goals.

With Fitness, users can track their activity, water intake, nutrition, steps, sleep, and calorie consumption all in one place. The app includes widgets that allow users to monitor their progress throughout the day, even without an Apple Watch. It also provides various timers for controlling workouts, such as Tabata, stopwatch, and timer.

Fitness supports both dark and light modes for user preference. To utilize the app fully, users are required to grant access to the Health app for comprehensive data tracking.