Introducing Doozy

The first device that watches
your baby grow, every day.

Development doesn't happen at checkups. It happens between them — in sleep, in sound, in movement. Doozy captures it continuously.

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Designed to be forgotten.

Soft enough to sleep in. Small enough to stay out of the way.

Doozy is built around one constraint: it can stay on as long as you want. The band is soft, lightweight, and sized for an infant wrist — worn comfortably through sleep, play, and everything in between. No hard edges, no screens, no charging interruptions that break continuity. Just quiet, continuous sensing.

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Infant-first sizing — Proportioned for wrists 0–24 months. Secure without pressure.

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Soft-touch finish — Gentle on newborn skin. Safe for overnight wear from day one.

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Continuous sensing — No buttons, no interaction required. Doozy works while your baby lives their life.

The only thing parents notice is what Doozy shows them in the app.

Radiation & connectivity — Doozy transmits wirelessly only when you choose — during active monitor mode. At all other times, data is stored locally and syncs when placed near your phone or the charging base.

What Doozy Is

Milestones are moments.
Development is everything in between.

Your baby's checkup lasts twenty minutes. The other eight thousand hours of that month? Invisible to any clinical tool in existence — until now.

Doozy is a soft, continuous wearable that monitors your infant around the clock, building a picture of development that no single appointment ever could.

What Doozy Tracks

Two windows into your baby's world,
open all day and all night.

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Sleep Architecture

Doozy tracks your baby's sleep cycles, duration, transitions, and consistency — night after night. Not just "did they sleep," but how, and whether that's changing over time. Sleep is the single most measurable window into infant neurological development, and Doozy keeps it open.

Continuous · Longitudinal · Contextualized

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Language — In and Out

The words your baby hears shape the brain they'll carry for life. Doozy tracks the richness and volume of your child's language environment — and as they find their voice, it tracks what they produce: babbles, words, conversational turns. Both sides of the language story, continuously.

Ambient Exposure · Vocalization · Turn-Taking · Word Emergence

See Doozy in Action

This is what development looks like, day by day.

Three screens from a real Doozy session — Noa, 5 months old.

A quiet check without opening the door. But this is just the beginning of what Doozy sees.

Language exposure and vocalizations tracked through every hour of the day — wherever your baby is, not just in the crib. Decades of research show that consistent exposure and interaction measurably improves vocabulary, cognition, and long-term outcomes. Noa's sounds, tracked daily — the first signs of language emerging in real time.

Doozy background sound and language environment screen

Keep an eye on your baby's exposure to TV and media, helping you ensure she's hearing more of what helps — real, live language.

How is my baby's development going?

Every parent wonders. Doozy gives you a continuous, objective picture of how your baby is actually doing — tracked alongside standardized pediatric milestone checklists. And beyond the big milestones, it helps you see and name the small ones: the progress that happens every day, that you'd otherwise never notice or remember.

Clinical Integration

Continuous data meets clinical context.

At each developmental stage, parents complete a short set of age-appropriate screening questions in the app. Doozy pairs those responses with continuous sensor data — giving your pediatrician a richer picture than either source could offer alone.

Age-triggered question sets

Parent input + sensor data, unified

Reports your pediatrician can use

The Science

Grounded in research.
Built for the real world.

Developed By

Practicing Pediatricians

Doozy was founded by practicing pediatricians — with the clinical instinct to know what matters, and the motivation to finally measure it.

Founded On

Decades of Research

The science behind Doozy draws on decades of published research in infant language acquisition and sleep neuroscience — fields that have long known what to look for, but lacked the tools to look continuously.

Advancing With

Academic Partners

We're partnering with leading academic medical centers to identify earlier biometric signals for developmental delays — signals that currently go undetected until the window for intervention has narrowed.

The Road Ahead

Doozy is designed to
learn as your baby grows.

Sleep and language are the foundation. But development is a system — motor patterns, social responsiveness, attention, and more all leave traces in continuous data.

As Doozy's dataset deepens, so does what it can see. The device you receive today is the beginning of something that will accompany your child through their most critical years of growth.

Sleep monitoring Cycle tracking, overnight architecture, night-to-night trends

Language environment & production Exposure richness, vocalization patterns, conversational turn-taking

Movement & motor development Activity complexity, movement variability, milestone signal detection

Developmental pattern recognition Longitudinal baselines, flagging changes that matter, pediatric integration

Your baby's growth model A continuous developmental record, personalized to your child

Early Access

Be among the first families
in our pilot.

Doozy is currently in development. Join the waitlist for priority pilot access, research findings, and updates as we build.

No spam. Just meaningful updates when they matter.

The first device that watches your baby grow, every day.