Ideas from Build This Next that didn’t stay ideas — built with AI, shipped in the open, and written up at Promptcraft.
Stop getting turned away at the airport lounge.
Which lounges do your cards actually get you into — at which airport, on which network, with what conditions? The answer existed only in fine print scattered across bank pages. CheckMyLounge puts it in one searchable place, before you fly.
A live World Cup probability tracker that updates as the tournament does.
Not a prediction column — a running model. Every result shifts every team’s odds of advancing, and you can see it happen. Built so fans can argue with the model instead of with each other.
Date-first event discovery: pick when you’re free, see everything that’s on.
Event apps make you browse by event and hope the date works. Real life works the other way around — you know your free evening, you want to see what’s on. Proposed in Build This Next, then built to prove it works.
Swap any color in an image for any other — the tool that should have existed already.
A dead-simple utility that somehow didn’t exist: pick a color in an image, pick its replacement, done. No design suite, no learning curve, no signup.