Breez SDK demo by Jesse de Wit -- seems super easy to build Lightning enabled apps. He just built a simple Flutter app in 10min on the stage!

Keys on your device, LN node running the cloud, using nostr:npub1jg552aulj07skd6e7y2hu0vl5g8nl5jvfw8jhn6jpjk0vjd0waksvl6n8n #Greenlight