Willo is an AI-powered baby tracker and parenting companion built for newborns through age six, helping parents make sense of changing sleep, behavior, development and daily routines. It organizes a child's journey into 35 developmental phases, provides age-specific guidance about sleep, feeding, milestones and mood, and includes Willo AI, an always-available parenting assistant for personalized questions and support. Alongside AI guidance, the app offers baby tracking, milestone and development monitoring, daily parenting tips, and a built-in sleep-sound library with white noise, womb sounds, lullabies and other calming audio.