Designed UI, IA, and marketing materials for 10+ mobile fitness apps on Apple App Store. Enhanced features include guided exercises, exercise tracking, achievement sharing, and nutritional information. Proposed and implemented new features like water intake tracking and a points system. Developed visual variations to align with clients' fitness coaching brands. Collaborated closely with the Plankk team to ensure a seamless and engaging user experience. The app successfully connected a user base of over 1500 users and fitness trainers.