Understand your child's sleep, without disturbing it.
Nucu tracks sleep, biosignals, and bedroom environment for children and teens ages 4–18 with no cameras, wearables, or disruption to their routine.
Understand wake-ups
Slides under mattress topper or bed sheet
Smart bedside hub
Processes sleep signals securely
Personalized sleep insights
Age-specific, plain-language guidance
Privacy by design
No cameras. No wearables.
• Now accepting Founder's Series sign-ups.
Founder's Series: lifetime app access included, free. Later customers will pay a subscription — Founders never will.
30-Day money-back guarantee
Free shipping within the EU
How Nucu Works
Slipped under the mattress once, Nucu quietly senses breathing, heartbeat, and movement every night — no charging, no daily setup — and turns it into clear data with real-time sleep + bedroom environment status and plain-language insights in your Nucu companion app by morning.
What’s Included
Nucu sleep sensor pad — soft, cleanable Alcantara surface
Nucu hub — birch wood casing
USB-C charging cable
*A USB power adapter is not included — the hub works with any standard USB-C adapter you may already have.
Dimensions & Power
Sensor pad: 30 × 10 × 0.5 cm — soft and flexible, not rigid (fluid-filled for precise sensing)
Hub: 14.5 × 6.6 × 1.9 cm (105g)
Power: USB-C
Shipping & Returns
Pre-orders include free shipping on qualifying orders and a 30-day money-back guarantee.
Privacy & Security
No cameras or wearables. Sleep data is processed securely with privacy by design.
Better sleep starts with understanding every night.
Nucu quietly tracks your child’s sleep from under the mattress, turning invisible sleep patterns into clear insights — without wearables, cameras or changing how they sleep.
See what happens at night
Understand wake-ups, sleep cycles and overnight patterns with meaningful data.
Personalized sleep insights
Receive clear reports that help you recognize habits and support healthier sleep routines.
Completely non-invasive
Placed under the mattress, nucu works silently while your child sleeps naturally.
How Nucu supports better sleep
Three simple steps.
Place
Place the soft and ultra-thin sleep sensor under a fitted sheet or under the mattress topper.
Sense
Nucu automatically tracks your child's sleep when they are in bed along with the bedroom environment. No recharging or daily activation required.
Improve
The sleep trends and insights flow automatically to your Nucu companion app via the secure WiFi cloud service. You can 'huddle' together with your family to reflect, celebrate the little wins and agree on the next week's targets.
Frequently Asked Questions
Can Nucu help improve your child's sleep?
Yes, Nucu helps your family see exactly how daily activities, evening routines, nutrition, and environmental tweaks impact your child's rest. When you discover what truly "moves the needle" for a better night's sleep, you can make confident, informed decisions while your child naturally builds healthy, lifelong sleep literacy.
Is Nucu a medical device?
No, Nucu is a wellness device intended for general informational purposes and is not a medical device under EU Regulation (EU) 2017/745 (MDR). It is not intended to diagnose, treat, cure, or prevent any disease or medical condition.
What information will I see in the app?
Nucu tracks every night, it doesn't just show you today's numbers it shows you
the trends behind them, so you can see what's actually helping.
How does Nucu track sleep?
Nucu uses a non-wearable sensor placed under the mattress to quietly monitor breathing, movement, and rest patterns throughout the night without ever touching your child.
Does the sleep sensor only work if the child is sleeping on top of it?
No. The sensor sits under the mattress and uses ballistocardiography — the same principle that detects heartbeats and breathing through tiny movements — so it keeps tracking accurately as your child shifts position, rolls over, or moves around overnight.
Is Nucu safe for children?
Yes. Nucu is CE-certified, meeting European safety and electromagnetic compatibility standards. It has no wearable parts, no cameras, and never touches your child — it sits quietly under the mattress, entirely outside their sleep environment.
Do I need to charge or turn on Nucu every night?
No. Set up Nucu once and it works automatically every night no charging, switches, or daily routine required.
Real feedback from our beta tester families
Nucu means sleep,
in Finnish.
A thoughtfully designed sensor, crafted for your child's sleep no cameras, no wearables, nothing to charge.