Example 03 · Invent · Café
An allergen checker a café could sell to other cafés.
It starts as a tool for one café's counter: customers tap what they need to avoid and see what they can eat. Then the owner realises every independent café has the same problem, and it could become a product.
Illustrative scenarioWorking demo
What the customer sees
Before
Allergen information sat in a folder behind the counter. Every question meant a member of staff checking recipes while the queue grew.
Built in a day
A menu filter for the 14 allergens UK food businesses must declare, with a link customers can save. Built with AI in under a day, using a sample menu.
What it's for
Find out whether customers use it at the counter, and whether other cafés would pay for their own version, before investing in a full product.
The important bit
Built in a day. Going live takes more.
Before real customers relied on this, it would need:
- Allergen data checked and signed off by someone accountable, because mistakes here can make people ill
- A simple way for staff to update recipes when suppliers change
- Separate accounts, so each café manages its own menu
- Subscription billing and terms of service
- Accessibility testing for customers using screen readers
- Legal advice on how the information is worded
On the day, we'll tell you honestly which of these your idea needs, and what they'd take.
App in a Day · 17 November 2026
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Spend one practical day turning it into something that works, with us in the room.
full price £297£150 + VAT per place · 20 placesSuper Early Bird, until 23 October
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