The door sensor kids like

Make safety sound like a party.

Door Jammer sits on your child's bedroom door. When it opens, a song your child picked plays and an alert goes to your phone. Naps and quiet play stay safe, and you stay calm.

Get Door Jammer for $35 See how it works

Plays cheerful music
Alerts when door opens
Kid-friendly design

A smiling mother dances with her giggling toddler in a sunny living room, with a Door Jammer box on the table by the door.

$35per sensor

A laughing mom, dad and toddler on a nursery floor while dad holds up a Door Jammer box.

Made for nap time and play time

A bedroom door sensor with a sense of fun

Door Jammer is a child bedroom door sensor for safe nap times and independent play hours. It plays music when the door opens and sends a notification to the guardian's phone.

What it does

It tells you the moment your child opens their door, so you know when they may be on the move.

Why we made it

Parents told us how hard it is to get chores done and still know their kids are safe. Door Jammer gives you a clear mind without watching the door.

Why it's different

Kids pick the song and decorate the sensor with stickers. Safety becomes something they get to be part of.

Features

Everything a parent needs, and a kid will love

One small sensor combines a door alarm, phone alerts, music and a design made for children.

Their song, their way

Your child picks the music that plays when the door opens. A favorite song turns a safety reminder into a happy one.

Alerts on your phone

Get a notification the moment a monitored door opens, whether you are in the kitchen, in the yard or on a call.

Decorate it

Put stickers on the slim sensor and make it theirs. A sensor a child likes is one they leave on the door.

Any indoor door

Use it on bedroom, bathroom, basement, front and back doors. Add one sensor for each door you want to watch.

Share with family

Share access so a partner, grandparent or sitter gets the same alert when they are the one in charge.

Open and closed status

Check the app any time to see whether a door is open or closed.

Try it

Decorate the sensor, then open the door

Door Jammer is slim, so it fits neatly on the door frame. Tap stickers to stick them on, then open the door to see what your child and you will see.

Stickers

Turn your volume up to hear the song.

Door openedBedroom door, just now

Illustration of the slim sensor. Sticker choices are examples.

How it works

From open door to phone alert in four steps

A magnet on the door and a sensor on the frame do the watching. Your home Wi-Fi does the telling.

1
The door opens

The magnet on the door moves away from the sensor on the frame.
2
The sensor notices

Its magnetic contact switch changes from closed to open, and the electronics inside read the change.
3
Wi-Fi carries the news

The sensor sends the status over your home 2.4 GHz Wi-Fi network through your router.
4
You get the alert

The Smart Life app shows the door status and sends your phone a notification while your child's song plays.

A mom relaxes on the couch and checks the Door Jammer alert on her phone while her toddler plays near the door.

Good to know Door Jammer works indoors, needs Wi-Fi, and mounts on the door frame and the door.

The product

Meet the Door Jammer set

A sensor and magnet pair, packed in a box that is ready for gifting.

The Door Jammer box surrounded by sticker designs: tulips, a sailboat, sports balls and safari animals.

Door Jammer Sensor Set

Sensor and magnet, sold as a pair so the Wi-Fi connection goes smoothly.

$35per set

Door Jammer sensor
Matching magnet
Decorating stickers
Mounting adhesive and quick-start card

Total $35

One set watches one door. Add a set for each door you want covered. This storefront is a prototype and checkout is not open yet.

Sensor body	70 × 26.4 × 21.6 mm2.76 × 1.04 × 0.85 in
Magnet	50.4 × 15 × 17.6 mm1.98 × 0.59 × 0.69 in
Detection	Magnetic contact, reports open and closed
Connection	Wi-Fi, 2.4 GHz home network
App	Smart Life for setup, door status and alerts
Where to use	Indoors, on a door frame and door

Installation

Up and running in a few minutes

No tools and no wiring. You need your phone, your home Wi-Fi and a clean spot on the door.

With the door closed, the magnet sits right beside the sensor. When the door opens, they separate and Door Jammer sends the alert.

Get the app

Install the free Smart Life app on your phone, create an account and connect your phone to your home 2.4 GHz Wi-Fi network.
Pair your sensor

Add Door Jammer as a new device in the app and follow the prompts. The indicator light blinks while it connects.
Stick it on the door

Clean and dry the door frame and the edge of the door. Press the sensor on the frame and the magnet on the door so they sit side by side when the door is closed.
Test and decorate

Open the door and check that your phone gets the alert and the song plays. Then let your child add stickers.

Why it matters

Most childhood injuries happen at home

Young children move fast and quiet. A door that opens during a nap or solo play is the first sign they are on their way somewhere. Door Jammer tells you right away so you can step in.

2,200children die each year from an injury in the home

3.5 milliontrips to the emergency department each year for injuries that commonly happen in homes

Source: Safe Kids Worldwide, Protecting Children in Your Home: The Facts

Who it's for

Built for kids. Handy for the whole household.

Families with young children

Nap time
Independent play
Bathroom and basement doors
Front and back doors

Anyone who looks after someone who may wander

Guardians of people with special needs
Caretakers of people with dementia
Families of sleepwalkers

Questions

Answers for parents

Does Door Jammer need Wi-Fi?

Yes. It connects to your home 2.4 GHz Wi-Fi network, and your phone gets the alert through the Smart Life app.

Can my child choose the music?

Yes. The song that plays when the door opens is picked by your family, and your child can decorate the sensor with stickers.

Which apps does it use?

Smart Life handles setup, door status and phone alerts. MacroDroid helps trigger the song when the door opens.

Can I use it outside?

No. Door Jammer is made for indoor doors, windows and cabinets, mounted on the frame and the door.

How many sensors do I need?

One set for each door you want to watch. Many families start with the bedroom and add the bathroom, basement or back door.

Is it ready to buy?

Door Jammer is in prototype testing. Safety checks for children and alert reliability tests come before launch.