Onlyfits is a personal fitness trainer application designed for iPhone users, aimed at helping individuals achieve their fitness goals. It offers a variety of features that cater to different fitness objectives, including weight loss, muscle gain, body sculpting, and glute enhancement. Users can easily select their desired goal and receive tailored workout plans and nutritional advice.

The app includes a smart calculator that determines the user's precise macronutrient needs based on individual parameters and activity levels. With four distinct workout programs available at three different difficulty levels, users can choose to train at the gym or participate in online workouts from home. Additionally, Onlyfits allows users to track their progress, connect with like-minded individuals, and receive feedback from qualified trainers, making it a comprehensive fitness solution.