Fitbit co-founders James Park and Eric Friedman have launched Luffu, a new company offering the Luffu Link, a $300 screenless wearable designed to help families monitor aging parents and coordinate care through continuous health tracking, location sharing, and AI-powered insights. The device connects to cellular networks, offers five days of battery life, and syncs with a companion app ($19/month for four family members) that surfaces health patterns and care coordination information in real time.