Type your idea in plain English. Napkin builds a clickable prototype you can put in front of investors, partners, and customers — today.
$249.95. 3 revisions included. Yours to keep.
If we can't build it, you're refunded automatically — before you could even ask.
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Five plain-English questions. If you can explain it to a neighbor, you can fill this in.
AI designs every screen with realistic content. Watch it happen. Usually done in minutes.
A live link that opens clickable on any phone or computer, a download, and 3 revisions to make it perfect.
Real prototypes, built by Napkin from briefs just like yours. They open right on your phone.
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Tap to try →If our system can't build a quality prototype from your brief, it refunds you automatically — no email, no phone call, no "let me talk to my manager." The refund is issued before you could even ask. Nobody else can say that, because nobody else built it into the machine.
Need more polish later? Extra revision packs are $49.95 for 3, whenever you want them.
Napkin is built by JSH — a focused human-plus-AI team that ships production software on fixed-price terms. Your prototype can become a working product: clickable pitch build in two weeks, production-ready in three months.
Your prototype, built for real users — accounts, payments, data, the works. Fixed-price quote, no hourly surprises.
A deeper clickable build for fundraising and pilots — fully credited toward your production build.
Logo, colors, and a look that's unmistakably yours, applied across your prototype.
Move your prototype to yourname.com with professional hosting and email.
Monthly plan: we keep it fresh, updated, and growing as your business does.
Tell us where you're headed. We'll tell you the shortest path there.
Pick what interests you — a real person from JSH reaches out with details. No obligation.
It's a clickable prototype — every screen works, buttons respond, and it looks and feels like the real thing. It doesn't store real customer data or take real payments yet; that's what a production build adds. It's exactly what you need to test the idea, win interest, and raise money.
You get 3 revisions included — tell us what to change in plain English. Every version is saved, so you can always go back. And if our system can't build your idea at all, you're refunded automatically.
You do. Share the link, show it to anyone — and download the file itself. The download is a complete, self-contained copy that runs in any browser, no Napkin required.
Under 15 minutes, start to finish: about 5 to answer the questions, a few for the build. You watch it happen live, and your shareable link is ready the moment it’s done.
Plain English is perfect. Write it like you'd explain it to a neighbor.
This shapes the words, screens, and tone of your prototype.
Pick the pieces your prototype needs. Choose 3–6 for the best result.
Don't overthink it — this just sets the starting style. Revisions can change it.
Give this a quick look, then head to secure checkout.
Confirming your payment…
This usually takes a few minutes. You can close this page — your link keeps working, just come back to this site on the same device.
Pick what's off, then tell us how you pictured it. The more specific, the better the fix.
Every build is saved. Preview any version, and bring one back with a click — restores are free and never use a revision.
Check what interests you and a real person from JSH will reach out with details and straight answers. No obligation, no pressure.
Question, problem, idea — tell us and we'll get back to you by email.
Enter the email you used at checkout and we'll send you a link to your prototype library — every prototype you've bought, on any device.