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How it works

Smaller than you think.

Five sensors, each about the size of a matchbox. They run on small batteries, stick up with an adhesive pad, and notice movement and nothing else.

Motion sensor3.3 × 4.2 cm
Door sensor2.2 × 4.1 cm
£1 coin2.3 cm

Drawn to scale.

Set up in about fifteen minutes.

No engineer, no drilling, and nothing for them to learn.

Kitchen
Bathroom
Bedroom
Lounge
Door
1

It arrives ready.

Every sensor is paired, tested and labelled for its room before it leaves us.

2

Stick each one up.

High in a corner of its room, and one on the front door. An adhesive pad holds each one.

Connected
3

Plug in and scan.

Plug the hub into power and the router, then scan the QR code. Hearth starts learning straight away.

No spare cable by the router? The hub joins the home WiFi from your phone during setup, and you can reconnect it from the app if the WiFi ever changes.

Everything Hearth watches for.

Each alert says what Hearth saw, in plain words, measured against their own usual. Most days, the evening update is all you'll hear.

Not up by their usual time
Morning check: Mum

Mum hasn't been active yet this morning. This may be nothing — worth checking in.

A long stay in one room
Mum may need a check

Mum was last seen in the bathroom and hasn't been picked up anywhere else in 50 minutes. Stays there usually run under 20 minutes at this time of day (learned from 46 visits). Worth checking in.

No movement anywhere
Mum: no movement seen

No movement has been picked up anywhere in the home for about 3 hours. Please check in.

An outing that runs long
Mum has been out a long time

Mum has been out for 4 hours. Outings usually run under 2 hours (learned from 31 outings). Worth checking in.

The front door left open
Mum: front door open

The front door has been open for 15 minutes with no movement inside since it opened. Worth checking.

A day that looks different
Mum's day looks a little different

Mum's day looks a little different from usual so far: fewer kitchen visits than most days, no outing yet, when there usually is one. This may be nothing, but it might be worth a call.

Not seen since the bathroom
URGENT: check on Mum

Mum left the bathroom during the night but no sensor has triggered in 15 minutes. Risk of a fall in the hallway. Check immediately.

The front door, in the dark
Mum: door opened at night

The front door was opened during the night. This is unusual and may need attention.

Too long in the bathroom
Mum: extended bathroom visit

Mum has been in the bathroom for an unusually long time during the night. Please check in.

Up, and not back to bed
URGENT: Mum awake at night

Mum has been in the lounge for an extended period overnight without returning to bed. Please check in.

The door left open at night
Mum: front door open at night

The front door has been left open during the night with no movement inside. Please check immediately.

Night safety is on from the start

These are the alerts that can't wait until morning, so they're on by default.

Everyone in the loop

Everyone in the care circle gets the same alerts, so whoever is closest can act. A tap on Mark safe stands one down.

Family staying?

Visitor mode tells Hearth the extra movement is expected.

Grounded in research

Small changes, noticed early.

Changes in daily routine can be one of the first signs that someone is struggling. They're invisible in a phone call, but clear over a few weeks.

Nights
20%

higher risk of falls for older people who get up in the night to pass urine. A sudden rise in night trips can also be a sign of a urine infection.

Hearth counts bathroom trips every night, and shows the trend.
  • Pesonen et al. · Journal of Urology, 2020
    Meta-analysis: getting up at night to pass urine and falls
  • NICE NG249 · Falls, 2025
    Urinary continence is part of the falls assessment
  • UKHSA · Diagnosing urinary tract infections, 2025
    New frequency or urgency as a sign of infection
  • Capstick et al. · npj Digital Medicine, 2024
    UK Dementia Research Institute: bathroom visits at home and urine infections
Routine
85%

of the time, a month of home-sensor data told mild memory problems apart from healthy ageing, in a US study of 137 older adults.

Hearth compares recent weeks with their own usual.
  • Cook & Schmitter-Edgecombe · The Clinical Neuropsychologist, 2026
    Home sensors and mild cognitive impairment: 85% accuracy
  • Dawadi et al. · IEEE Journal of Biomedical and Health Informatics, 2016
    Smart-home behaviour tracks cognitive scores
Kitchen
More trips, or fewer.

A change in how the kitchen is used can be an early sign that someone is struggling.

Hearth tracks kitchen visits: how many, how long and when.
  • Wu et al. · Journals of Gerontology, 2022
    Home sensors: kitchen and bathroom use differ with mild cognitive impairment
  • Pérès et al. · Journal of the American Geriatrics Society, 2008
    Everyday tasks get harder years before a dementia diagnosis
Sleep
Broken nights. Long lie-ins.

Broken sleep is linked to low mood and frailty, and long nights in bed to frailty.

Hearth works out bedtime, wake time and how settled the night was.
  • Jackowska & Poole · Sleep Medicine, 2017
    English Longitudinal Study of Ageing: sleep problems and later low mood
  • Sun et al. · Sleep and Breathing, 2023
    Meta-analysis: sleep problems and frailty
  • Liu et al. · Archives of Gerontology and Geriatrics, 2025
    Meta-analysis: long sleep and frailty
Outings
Going out less.

Linked to loneliness, poorer mobility and a higher risk of dementia.

The front-door sensor counts outings, week over week.
  • Petersen et al. · PLOS ONE, 2015
    Time out of the home, measured by sensors like Hearth's
  • James et al. · American Journal of Geriatric Psychiatry, 2011
    A smaller life space and the risk of dementia
Moving about
Moving about less.

In and beyond the home, it's linked to frailer health and a higher chance of a hospital stay.

31room visits a day
usually about 44
↓
Hearth notices when a drop lasts.
  • Sheets et al. · Journal of the American Geriatrics Society, 2021
    Moving about less and later hospital stays
  • NICE NG249 · Falls, 2025
    Gait, balance and mobility are part of the falls assessment
  • Dodge et al. · Neurology, 2012
    Walking speed at home, measured by sensors

Changes are described, never scored: what changed, for how long, and how sure Hearth is. Something to mention on a call, or to the GP.

The details.

In the box

The hub, four motion sensors and one front-door sensor, each labelled for its room, and a cable for the router.

Motion sensors

3.3 × 3.3 × 4.2 cm. Battery powered. They notice movement and nothing else: no images, no sound.

Door sensor

4.1 × 2.2 × 1.1 cm, with a small magnet beside it on the frame. It knows open and closed, nothing more.

Hub

About the size of a paperback. It plugs into power, then into the router with the cable, or joins the home WiFi.

Range

The sensors use their own low-power wireless signal, not the home WiFi. In a large house, or one with thick stone walls, tell us the layout and we'll plan for it before yours ships.

Broadband

Needed. If Hearth stops hearing from the hub for 15 minutes it tells the care circle, so a silent hub is never mistaken for a quiet day. You're told again when it's back.

More rooms

Dining room, study, conservatory, hallway and more, for £4 a month each. They arrive paired with everything else.

The app

For everyone in the care circle, each with their own login. No limit on members.

Questions.

Does my parent need to do anything?

Nothing. No buttons, nothing to wear, nothing to charge. They carry on as normal.

Are there any cameras or microphones?

No. Hearth uses small motion sensors and a door sensor. They can only tell that something moved, or that the door opened. No cameras, no microphones, no video, no audio.

Can other family members see it?

Yes. Invite the care circle by email. Each person gets their own login, sees the same dashboard and gets the same alerts. There's no limit on members.

What are the written updates?

Each evening, Hearth writes a short plain-English note on the day: when Mum got up, how the day went, how last night was. It's on from the start and you can switch it off at any time in Settings. Only the day's headline figures (wake time, room visits, outings) are used to write it. With it switched off you still get the dashboard, patterns and alerts.

What happens when we no longer need it?

Cancel the subscription and send the kit back. We pay the postage, refurbish the hardware and pass it on to another family. You never pay for equipment you're not using.

How do I get one?

We're not taking orders yet. Build the package you'd want on the packages page and join the waitlist. Every Hearth is paired and tested for a particular home before it ships, so we bring homes on in small batches. When yours is ready we email you to confirm the details and send a payment link. Nothing is charged before then.

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Ready when you are.

Build the package you'd want, join the waitlist, and we'll email when your Hearth is ready to ship.

Build your package