Develop a luxury countertop showcase app with a clean, interactive "lookbook" style that allows clients to swipe through high-quality images of past installations. Organize projects by type or building, each with a brief description, material details, and a zoom feature for close-ups. Integrate an interactive map so clients can see installations by location and tap to view specific project galleries. Include video tours for select projects to give clients a comprehensive visual experience. Add "favorites" and "contact us" features to enhance client engagement and make it easy to inquire about similar work.