Hi Product Hunt! I'm Ümmügülsün, the maker of PhotonDrop. I built this app to solve a unique problem: How do you safely transmit sensitive data (like a crypto seed phrase or a highly confidential document) to a device that is completely disconnected from the internet, has Bluetooth disabled, and shouldn't be plugged into USB cables? The answer: Light. 💡 PhotonDrop uses Luby Transform (Fountain) Codes to turn your files into a high-speed waterfall of optical data (QR streams). Your screen acts as the transmitter, and your camera acts as the receiver. No network protocols (TCP/IP) involved. Key Features: 🔒 100% Air-Gapped: Zero Wi-Fi, zero Bluetooth. ⚡ In-Memory Previews: Render received files directly in RAM before saving. 🛡️ AES-256 Encryption: Military-grade payload protection. I built a custom native Swift pipeline for iOS to extract raw bytes directly from the camera hardware, avoiding the UTF-8 corruption standard QR scanners suffer from. I’d love to hear your feedback on the UX and how you might use air-gapped transfers in your daily workflow. Ask me anything about the tech stack!

PhotonDrop: Air-Gapped Transfer

Send files & secure keys via light. 100% offline.

Send files & secure keys via light. 100% offline.