This is a submission for Weekend Challenge: Generosity Edition

What I Built

Open Tab lets one customer's spare change help with someone else's purchase.

A customer reaches checkout and chooses to add a small contribution. The money enters a shared pool. Another customer can use part of that pool during an ordinary checkout, with no application and no explanation required.

I built it around a familiar moment: someone has enough for most of a purchase and could use a little help with the rest. Asking a stranger or an employee can feel exposing. Open Tab keeps that moment inside the same payment screen everyone uses.