Modern iPhone architecture design app, minimalist interface, sleek icon, flat design, white background, subtle shadows, 3D modeling tools, intuitive navigation, drag-and-drop features, real-time rendering, precise measurement units, various texture options, wood, metal, glass, fabric materials, customizable color palette, atmospheric lighting effects, 45-degree angle view, detailed floor plan, cross-section view, isometric perspective, virtual reality mode, morning sunlight ambiance.