Coachone - A Scalable Fitness Platform

Coachone is conceived as a sport-agnostic fitness and coaching platform where disciplines such as running, field hockey, football, and general strength training coexist within a shared system. Instead of building isolated solutions per sport, the platform is designed around a common structural core that allows new training types, exercises, and tactical concepts to be added without reworking the underlying system. The long-term vision is a continuously evolving coaching ecosystem shaped by its community.

The UI design covers the complete product surface across more than 120 individual screens, from onboarding and registration flows to workout creation, exercise browsing, and tactical planning for team sports. A unified design system is developed to ensure visual consistency, scalable components, and predictable interaction patterns across all areas of the app. Special attention is paid to complex workflows such as community-generated exercises and team tactics, balancing flexibility with clarity to keep the interface usable even as the platform grows.

The backend architecture is designed with extensibility as a core principle. The data model supports multiple sport types, collaborative workout creation, and real-world usage scenarios where users train together but synchronize data asynchronously. An offline-first approach is defined using Supabase as a backend-as-a-service combined with PowerSync for reliable offline synchronization. This ensures the app remains functional without connectivity while maintaining data consistency once devices reconnect.

The database architecture is structured to support evolving requirements without schema rigidity. Exercises, workouts, and tactics are represented in flexible data structures that can be serialized cleanly into JSON, enabling future AI workflows. This approach allows user ratings, performance feedback, and tactical variations to become machine-readable inputs, laying the groundwork for intelligent recommendations and generative systems without retrofitting the data layer later.

Coachone is designed to be built in Dart, enabling cross-platform deployment while retaining access to native device features. This choice supports a single codebase strategy without compromising performance or platform integration. The combination of Dart, Supabase, and PowerSync defines a modern stack optimized for mobile-first products, offline usage, and long-term scalability.