Web app / live beta
Digital products built around real constraints: specify the problem, ship a testable version and improve it against evidence.
CravateOne craving. One answer.
One answer to “what should I eat?” matched to budget, kitchen equipment and nearby shops.
Developed with Claude Cowork using Opus, Sonnet and Fable. A single-file PWA, with a Cloudflare Worker backend and Gemini API. No accounts, no database and zero cost to the user.
Open live projectCravate / development notes
A £6 budget test returned a £7.49 fast-food meal. The response exceeded the budget and failed the cost and nutrition comparison.
The option to recommend buying a meal had no clear conditions. It also rejected cooking because the original preparation method could not be reproduced exactly.
Keep recommendations within budget, compare cost and nutrition, and allow simple assembly using prepared ingredients. Match the result rather than insisting on the same cooking method.
Whether people find the suggestions useful enough to return. The app is in beta; repeat use still needs testing with real users.
Contact
Alongside developing JDC Ventures, I’m applying for 2027 entry to mechanical and aerospace engineering degree apprenticeships. I’m open to relevant placements, insight days and conversations about products, prototypes and early-stage ventures.
jdc@jfdcosta.com