Prototype Sprint
A running demo of your idea's hardest screen
Built for: People who need to show it to someone before they can fund it
Three weeks, one screen, actually running in a browser or on your phone. Not a mockup: real interaction, real data shape, deployed on a link you can send to a partner or a bank.
Pick the screen that decides whether the whole thing works. If the answer turns out to be no, you found out for €900 instead of €9,000. Half of it comes off a build you commission within 30 days.
Prototype Sprint
One core screen or flow, running and deployed on a shareable URL.
- Estimated hours
- 18 h
- Rate
- €50/h
- Delivered in
- 3 weeks
- Starting
- September 2026
- The one screen that carries the most risk, built for real
- Realistic sample data, so it demos without disclaimers
- Deployed to a URL you can send to anyone
- A short written note on what it proved and what it didn't
- The code, on a repo you own
- Accounts and login
- A backend or real data storage
- Store submission
- Anything past the one agreed screen
- A Spec Sprint or an equivalently clear brief
- Sample data, or permission to invent it
Things I've already shipped that this leans on.
Not sure this is the right one?
Then don't order it yet. A €300 Spec Sprint gets you a written, fixed-scope plan with the hours in it, and the whole €300 comes off whichever package we land on. That's the honest order to do this in.
40% deposit, 40% at the agreed midpoint, 20% on handover. All prices ex. VAT. Dutch customers pay 21%; EU businesses with a valid VAT number are invoiced at 0% under the reverse-charge rule.