GlassPing: Let strangers reach your car, never your number

GlassPing is a $5 QR sticker for your windshield. Anyone who needs to reach you scans it, sends a message or photo, and you get an instant push ping - no app for them, no number from you. One-time payment, unlimited messages, your number never leaves your pocket. Maker's first comment (the story - this is what gets engagement) Hey hunters 👋 Ever come back to a blocked-in car, a flat tire someone noticed hours ago, or a fresh dent with no note? The usual fix is scribbling your phone number on a piece of paper and leaving it in the window - which means handing your number to every single person who walks past your car. That always bugged me, so I built GlassPing. It's a small QR sticker you put inside the bottom corner of your windshield, facing out. When someone needs to reach you - headlights left on, you're parked them in, a delivery driver can't find you - they just point their camera at it. A simple message form opens (no app, no account, no download), they type a quick note, optionally attach a photo, and hit send. You get a push notification on your phone in seconds. The whole thing is built around one idea: the helpful stranger can reach you, and nothing else can. 🔒 Your number, name, and email are never visible to whoever scans 📲 Instant push pings (works on iOS 16.4+ and Android via PWA - no App Store) 🚫 No data selling, GDPR & CCPA compliant, messages auto-delete after 90 days 💸 $5 once. No subscription, no upsells, unlimited inbound messages forever It's handy for everyday parking, EV charging etiquette, lost items near your car, and fleet/delivery vehicles (one sticker per van, customers reach the right driver without published numbers). Would love your feedback - especially edge cases I haven't thought of and where you'd want this beyond the windshield. AMA! 🚗