Campus Notebook Sales App UI

I am setting up a marketplace app that lets students buy and sell notebooks exclusively within our university. What I need first is a polished, professional-looking interface that feels as smooth as any modern retail app yet remains light enough for fast campus Wi-Fi.

The design has to cover every core flow: a clean product-listing grid, detailed item pages, an intuitive sign-up / log-in sequence, and a built-in chat so buyers can message sellers without leaving the app. Because the build will target both iOS and Android, every component must respect their respective guidelines while still sharing one consistent visual language.

I picture a sleek colour palette, crisp typography, and subtle micro-interactions that keep the user focused on the notebook they want instead of on the interface itself. If you work in Figma, Sketch, Adobe XD—or any tool that exports ready-to-hand developers assets—let me know; the engineers will move forward in a cross-platform stack (likely Flutter or React Native) once the UI kit is final.

Deliverables I’m expecting:
• Low-fidelity wireframes to lock in layout
• High-fidelity mock-ups for every required screen (listing, detail, login/registration, chat)
• Clickable prototype for user testing
• Final asset package & style guide (colours, typography, icons)

Share links to two or three past projects that show a similarly professional aesthetic and, if possible, multi-platform considerations. If our timelines align, we can jump straight into wireframing this week.