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Mobile App (React Native)•Sonora Labs LLC

Willo

An AI-powered baby sleep and parenting app — we designed & built the complete native mobile experience with developmental tracking, smart audio library, and 24/7 AI parenting assistant

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Willo app — A parenting companion app helping sleep-deprived parents track baby growth, calm crying, and build soothing routines with AI-powered tips.

Project Overview

Willo helps tired parents understand their baby's development through 10 unique "jumps" — developmental stages that explain sleep regressions, crying spells, and behavioral changes. The app combines smart tracking, calming sounds, emergency support, and an AI assistant to bring clarity and confidence to early parenthood.

Our Role

  • Native mobile app development (React Native + TypeScript)
  • AI integration with OpenAI for 24/7 parenting assistant
  • Audio playback system with background mode (React Native Track Player)
  • Subscription & paywall system (RevenueCat + Superwall)
  • Backend architecture & real-time sync (Firebase)
  • Apple & Google sign-in integration

Tech Stack

Mobile
React NativeTypeScriptReact Navigation
Backend & Sync
FirebaseFirestoreFirebase AuthFirebase Storage
AI & Intelligence
OpenAI APISmart Recommendations
Audio
React Native Track PlayerBackground AudioPush Notifications
Monetization
RevenueCatSuperwall
Analytics
MixpanelAppsFlyerFacebook SDK

Challenge

Creating an app that provides immediate help for overwhelmed parents while explaining complex developmental changes in a simple, reassuring way, without overwhelming users with too much information.

Solution

We built a multi-layered system combining developmental tracking, an AI chatbot for instant answers, a curated sound library for calming, and bite-sized insights. The "jumps" framework helps parents anticipate changes, while the Panic Button provides immediate relief. Willo AI (powered by OpenAI) offers 24/7 support tailored to each baby's age and current developmental stage.

Results & Impact

Helping parents feel confident and supported
Providing instant AI-powered parenting guidance
Calming babies with scientifically-designed sounds
Empowering parents through developmental understanding

Engineering Highlights

Apple & Google OAuth flows with secure session management
OpenAI streaming chat implementation for real-time AI responses
Background audio playback with notification controls
RevenueCat subscription management with Superwall paywall optimization
Firebase Firestore data model for baby profiles and developmental tracking
Push notification system with Notifee for parenting reminders

Key Features

Baby Tracker & Development

  • 10 developmental "jumps" with insights
  • Baby profile with growth tracking
  • Sleep disruption & regression explanations
  • Milestone tracking & "What to expect" tips

Willo AI: 24/7 Assistant

  • Real-time AI chat powered by OpenAI
  • Science-backed answers on sleep, feeding, milestones
  • Context-aware responses based on baby age
  • Emotional support for parents

Panic Button & Sounds

  • Emergency calming sounds for crying babies
  • Sleep sound library (white noise, lullabies, nature)
  • Background audio with notification controls
  • Favorites & personalized playlists

Platform & Monetization

  • RevenueCat subscriptions with Superwall paywalls
  • Apple & Google sign-in authentication
  • Cross-platform sync via Firebase
  • Push notifications for parenting tips
Baby Growth Tracking

Developmental Jumps: Stay Ahead of Changes

Why it matters
Understanding why your baby is suddenly fussier, sleeping poorly, or acting differently brings clarity and reduces parental anxiety
10 unique developmental "jumps" with explanations
Age-specific insights into sleep regressions
Milestone tracking and skill development
Preparation tips for upcoming changes
Willo — Developmental Jumps: Stay Ahead of Changes
24/7 Smart Assistant

Willo AI: Your Always-On Parenting Companion

Why it matters
Parents need answers at 3 AM when pediatricians are closed — AI provides instant, science-backed guidance anytime
Real-time chat powered by OpenAI
Context-aware responses based on baby age and current jump
Science-backed answers on sleep, feeding, and development
Emotional support and reassurance for parents
Willo — Willo AI: Your Always-On Parenting Companion
Instant Calming Relief

Panic Button & Sleep Sounds

Why it matters
When babies won't stop crying, parents need immediate tools — the Panic Button provides scientifically-designed sounds that can break crying spells
Emergency calming sounds for overwhelmed moments
White noise, pink noise, womb sounds, lullabies
Background audio playback with lock screen controls
Curated library for bedtime routines
Willo — Panic Button & Sleep Sounds

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