Developed a full-featured cross-platform mobile app for 4Ever Young, a UK-based medical spa, using Flutter. The client needed an app that showcased all spa services, supported appointment bookings, integrated dark mode, and used location services to help clients find nearby branches. Their goals focused on enhancing user experience, simplifying the booking process, and aligning the design with their brand’s luxury feel. One of the major challenges was that their backend system was outdated, unstable, and lacked proper mobile API support. It was not built for integration, which made the booking system difficult to connect natively. To overcome this, I built a custom communication layer to connect the backend with the app and restructured the booking flow to ensure speed and reliability. I also implemented dark mode support, integrated location features, and optimized the user interface for a seamless experience. Despite backend limitations, I delivered a modern, responsive, and reliable mobile app that met the client’s expectations and improved customer engagement. The app is now fast, intuitive, and fully aligned with the brand’s aesthetic.