Your idea stays yours. The sprint runs through a ChatGPT Custom GPT — OpenAI’s terms prohibit using your inputs to train models. We don’t store, share, or access your sprint data. If you upgrade to an Expert Review, your brief is covered by our standard confidentiality terms. For additional protection, we offer NDA signing before any human review.

Every estimate is confidence-rated (high / medium / low) so you know exactly how much to trust each number. The free sprint gives indicative ranges based on similar product types. The £49 Expert Review narrows these significantly — a real engineer cross-references your spec against actual supplier quotes and manufacturing methods. Think of the sprint as “right ballpark” and the review as “budget you can plan around.”

That’s exactly the point. Finding out your idea has a critical flaw in a free 2-hour sprint is infinitely better than finding out after spending £20,000. The sprint won’t just say “not viable” — it’ll tell you specifically what the blockers are. Often, ideas can be pivoted or de-risked by adjusting the specification. That’s a result, not a failure.

No. The sprint adapts its language and depth to your experience level. Whether you’re a first-time inventor or an experienced engineer looking for a structured process, the AI adjusts. You just need to be able to describe what your product does and who it’s for — the framework handles the rest.

Most people complete it in 1–2 hours, but it’s entirely at your pace. You can pause, come back, and pick up where you left off. Some users blast through in 45 minutes; others spread it over a weekend. There’s no timer and no pressure.

Any physical product — consumer goods, IoT devices, garden structures, medical devices, furniture, industrial equipment, tools, packaging. The framework was built from delivering 280+* real products across every category. If it needs to be designed, manufactured, and sold, the sprint covers it.