Use a hackathon app builder to get a working demo in front of judges fast
At a hackathon, the scarce resource is time, and judges see a demo, not your architecture. An AI hackathon app builder helps most when it turns the idea into something clickable early, so the team's hours go into the part that's genuinely new. Anticode can build a working browser app with labelled sample data from a description, publish it at a link judges can open, and export it to Next.js if the project lives on.
Check the rules first
Hackathons differ on AI tools and existing code. Some welcome them, some require everything to be written during the event, some ask you to declare what you used. Read the rules, ask the organisers if unsure, and say in your submission what Anticode built and what your team built. Judges generally respect a clear account more than a polished mystery.
What judges respond to
- A problem stated in one sentence, with a real person who has it.
- A demo that works when clicked, not slides of what it would do.
- One moment that shows the idea, rehearsed until it takes under a minute.
- Honesty about what's simulated. "This uses sample data; here's how real data would arrive" beats a demo that pretends.
- A sense of what's next, briefly.
A schedule that uses the builder well
| When | What |
|---|---|
| Hour 0 to 1 | Agree the problem, the user and the one demo moment. Write the build request together. |
| Hour 1 to 2 | Build the first version. Answer the Architect's questions, check its short plan, then build. |
| Hour 2 to 10 | Refine with change requests, one at a time. Add realistic sample data and the screens the demo walks through. |
| Hour 10 to 18 | The team's own work: research, the novel algorithm, the pitch, user interviews, whatever the builder can't do for you. |
| Hour 18 to 22 | Freeze features. Polish the demo path, fix anything that breaks, rehearse. |
| Last hours | Publish, test the link on a phone, prepare a fallback screen recording. |
Anticode's Architect talks the request through before building: it asks up to three questions where the answer changes the build and shows a short plan of name, sections, look and features. Use that moment to make sure the demo path is in the plan. Version history keeps your recent saves, so if a late change breaks something, restore the version that worked.
Sample data, labelled
Anticode apps run in a sandbox with no network: no live APIs, no real accounts, no payments, no AI model inside the app. Anything that would need a server is simulated with realistic sample data and labelled "Demo data". For a hackathon that's usually fine and sometimes better, because the demo can't fail on venue Wi-Fi or a rate-limited API. Ask for sample data that tells your story: the user with the problem, the before and after, the edge case that shows you thought about it.
If your idea depends on a live integration or an AI feature, simulate its output in the app and show the real piece separately: a notebook, a script, an API call run from a terminal. Say clearly which is which.
Describing the demo
Write the request around the demo path: "A hackathon demo app for a tool that helps food banks plan collections. A volunteer coordinator opens a dashboard of this week's donations (sample data, labelled), sees a shortage of tinned protein highlighted, and generates a collection plan by supermarket. Three screens: dashboard, shortage detail, plan. Calm, accessible design, works on a phone. Sample data for 12 supermarkets."
Publish it, then test the link on a phone and a laptop that aren't yours. Anyone with the link can open a published app, which is what judges need.
If the project continues
Most hackathon code is thrown away, and that's fine. If yours isn't, the Next.js export covers app builds and gives you a standard TypeScript project with Postgres through Prisma, email sign-in and an admin area. Push it to a GitHub repository you choose, and replace the sample data with real data and real accounts there. It's a starting point; the work of connecting real services is still yours. The guide on moving to custom code covers when to make the jump.
Limits
- No live data, accounts, multiplayer or AI inside the app. Simulate and label.
- No camera, microphone or location, so hardware and sensor demos need another tool.
- Builds need an account, and each build uses your allowance; a quote is shown before each. See pricing.
- One page app. It's written as one HTML document; large multi-service architectures aren't what it builds.
Questions people ask
Can the whole team edit it?
A Team workspace has shared seats. On a personal account, one person runs the builder while the others work on the pitch and research.
Can judges try it on their phones?
Yes. Share the published link or a printed QR code. Each judge gets their own copy, with the same sample data.
Is the code ours afterwards?
You can export it as one HTML file or as a Next.js project and push it to your own GitHub repository.