A no-code Lovable prototype rebuilt from scratch into a production-grade EdTech SaaS — with a multimodal AI quiz generation pipeline, seven question types, Stripe subscriptions, and gamified learning streaks.

KLUUU had a clear product hypothesis: students and self-directed learners should be able to drop any study material — a PDF, a DOCX, an image of lecture notes — and get a ready-to-take quiz in seconds. The concept had been validated with a rapid prototype built on Lovable, an AI-assisted no-code builder. Early users responded well; the core loop worked.

But the prototype had hit its ceiling. The generated scaffold offered no control over the database architecture, no custom backend logic, no path to a real subscription model, and code that was too fragile to extend with confidence. Moving from a validated idea to paying customers required a complete rebuild.