One day. One problem. One working prototype. With App in a Day, we make your idea tangible on the very same day: thanks to AI and vibecoding, we build a working app that you can not only test, but actually use.
Why App in a Day?
Here's what's included, for €1,900
At 5 PM, this is what you walk away with:
- A working prototype you can click through yourself
- Problem analysis and key insights
- A concrete action plan
- A substantiated go/no-go advice
- A slide deck with all outcomes
One fixed day rate, no post-calculation. Preparation, facilitation and delivery included.
What does App in a Day deliver?
Working prototype
No mockup, no report, but an app you click through yourself
Faster decisions
By the end of the day there's something you can actually decide on
Less risk
Invest one day before committing a development budget
Straight ahead
The outcomes are immediate input for the next step
Want to get acquainted before App in a day?
Want to find out if App in a Day fits your challenge? Schedule a meeting and we'll discuss together what you need to walk away with a working prototype in just one day.
Our approach
Together with you, we choose one problem to solve that day. We start with what you want to achieve and only then start building. That way, the prototype fits your challenge.
Then we use AI and vibecoding to build fast: from description to a working app, in hours instead of weeks. An experienced expert checks quality throughout the day, so speed never comes at the cost of reliability. Your own people build along with us. That way you see right away what is taking shape, and buy-in grows naturally.
We keep it pragmatic: just enough prototype to answer the right questions, no more. You work with a fixed price and without obligations.
The day consists of five steps. At the end, there is always something that works:
- 1
Kick-off (30 min)
We start the day by sharpening the goal, the context and the expectations. What is the problem we are tackling today, and what needs to be delivered by the end of the day?
- 2
Zoom in on the problem (60 min)
We dive deeper into the challenge. What is the real problem behind the problem? By properly defining what is going on, we prevent building the wrong solution later.
- 3
Brainstorm solutions (90 min)
With the problem clearly in view, we explore ideas and possible solution directions. Together we choose the most promising direction to work out.
- 4
Build (3 hours)
The real work: we build a working prototype live, with you present. No mockup, no sketch, an app you can click through yourself at the end of the day.
- 5
Demo & next steps (60 min)
We present what has been built, discuss the outcomes and determine what the next step is. You leave the day with a working prototype and a concrete action plan.
Get in touch
One day is all you need to know if the idea is worth it.
FAQ
What happens after App in a Day?
App in a Day is phase one of a proven journey:
Phase 1 - App in a Day (1 day)
Choose one problem and build a working prototype for it live.Phase 2 - Design Sprint / Opportunity Scan (1–2 weeks)
Go deeper into users, scope and business case. Know what's needed.Phase 3 - Development (weeks to months)
Build the real application in short iterations, with your team involved.Phase 4 - Continuous improvement (ongoing)
Measure, refine and expand based on real usage.Can we really pull this off in one day?
For most ideas, yes. The exact time depends on complexity, but the starting point is: you begin the morning with a description and end the day with something working that you can test.
Invest one day to avoid building for months.
Is the app the same as the real product?
No. An app built during App in a Day is meant for learning and testing, not for running in production. What you learn is then used to build the real product properly.
What exactly is 'vibecoding'?
Vibecoding means using AI to go from a plain-language description to working software, quickly. Useful for making ideas tangible in a short time. We use it where it delivers speed, with an expert checking quality along the way.