So I built SandSquad — a shared beach day planner: 🧺 Checklist with who's bringing what 💸 Expense splitting that tells you exactly who owes who (no more mental math) 🗳️ A live poll for "which beach?" 📸 A shared photo wall from the trip Everyone joins the same plan with a link or QR code, and it updates live for the whole group powered by Supabase under the hood for real-time sync and storage. It's a PWA, so no App Store needed: open it once, add it to your home screen, and it works offline too.