Arms itself
Set the hours it should be armed. Disarm early with the remote and it re-arms after a gap you choose.
Home alarm · 24 GHz K-band radar
Know the moment someone is inside.
Radar sensors notice a person moving in your home. The hub sounds the siren and switches on the lights at once, and every phone you choose rings about two seconds later, even with the app closed.
Film · 1 min 15 s
See it work in 75 seconds
From the first movement to the alarm on your phone, then a tour of the app and the remote.
How it senses
K-band radar, not cameras
Each sensor sends out a faint 24 GHz radio signal and listens to its echo. When a person moves, the echo changes.
Intelligent detection algorithms tell that change apart from background noise, so the alarm answers to real movement.
- Works in total darkness. Radar needs no light at all.
- Nothing filmed or recorded. There are no cameras or microphones anywhere in the system.
- Tuned room by room. Set each sensor's sensitivity in the app; its light glows amber so you know which one you are changing.
When someone gets in
It acts before you have even looked
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+0 s
A sensor picks up movement
While the system is armed, any sensor that notices a person starts the alarm.
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+0 s
Siren and lights
The hub sounds the siren for the time you set and switches the lights on, so the intruder knows they have been seen.
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+2 s
Every phone rings
An alarm on your phone and on everyone you share with, saying which sensor and where.
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Then
You decide
Family coming home early? Disarm with A or in the app. Otherwise let it sound, press D for panic, or call for help.
The app
Everything in reach, nothing buried
- 1
Is everything all right?
The hub's state at a glance, checked live whenever you open the app.
- 2
Arm, disarm or panic
One big button to arm or disarm from anywhere, and panic when you need help now.
- 3
Holiday mode
Pick the day you are back; the hub stays armed around the clock until then.
- 4
Siren and lights by hand
Switch them while disarmed, the same as B and C on the remote.
Real screens from the Smart Sentry app for Android, shown with sample data.
Try it
The remote
Four buttons, rules you can trust
Disarmed
Siren offLights off
Press A to arm the demo hub.
- A
- Arm or disarm. Two chirps when arming, one when disarming. Disarming also stops an alarm or panic.
- B
- Siren on or off. Only while disarmed.
- C
- Lights on or off. Only while disarmed.
- D
- Panic: siren until its time limit, lights flashing and an alarm on every phone. Works in any mode.
During panic only A, D or the app end it. B and C do nothing until panic is over.
Built for real homes
It fits the way you live
Holiday mode
Armed day and night until the day you are back, without touching the schedule.
Share access
Give family or staff their own access: view only, operate, or manage settings. Remove it any time.
Tune each sensor
Name every sensor and set its sensitivity; its light glows amber while you do.
Checks in daily
The hub reports its health once a day and tells you if a sensor stops responding, without nagging about every blip.
Keeps working offline
If the internet drops, the sensors, siren and remote keep protecting your home, and the app says the hub is offline.
Private by design
It watches for movement, not faces
Protecting your home should not mean filming it.
No cameras, no microphones. Nothing is filmed or recorded.
Your arming history stays home. It is kept on the hub, not on our servers.
Alerts do not pile up. They delete themselves after 90 days, and Clear empties your list any time.
No ads, no tracking, never sold. Read the privacy policy.
Questions
Before you order
Is it really radar?
Yes. Each sensor contains a 24 GHz K-band radar: a very low-power radio that notices movement from its echo. It needs no light and records nothing.
What do I need at home?
An internet router with a free network port for the hub, and a power point for the hub and for each sensor. The app runs on Android phones today; iPhone support is on the way.
What if the internet or the power goes down?
Without internet the hub, sensors, siren and remote keep working at home, and the app tells you the hub is offline. After a power cut the hub comes back the way it was, armed or disarmed, and the app shows that it restarted.
How do I stop a false alarm?
Press A on the remote or Disarm in the app. During panic, press A or D, or end it in the app.
Will my pets set it off?
Each sensor's sensitivity can be turned down in the app, and sensors work best pointed at doorways and passages that people use.
How many sensors can one hub run?
Up to seven. Each has its own name in the app, so you know exactly where movement was picked up.
Can more than one person get the alarms?
Yes. Share access from the app and everyone you add gets the alarms on their own phone. You choose what each person may do.
Get the app
The app for Android, straight from us
You set up and run your system from it. Everyone you share access with needs it too, so the alarm reaches their phone.
Download for Android
Older phone? Get the 32-bit version (20 MB).
Verify the download
- SHA-256, Android
- 1c1d5f054c65ee2a2c08ac5644c505b84a134fab653a0eba23ce7755d8b3e53e
- SHA-256, 32-bit version
- 34fc77a202bcc723ded5178f155d1cc66ac9da00104c12120f3f5c3857d07958
- Open the file when the download finishes.
- Allow installs from your browser if your phone asks. It only asks the first time.
- Open Smart Sentry and sign in, or create your account.
On an iPhone? The iPhone app is not available yet. Email us and we will tell you when it is.
Order
Get Smart Sentry
Smart Sentry is made in small batches. Tell us where you live and how many rooms to cover, and we will come back to you.
- Send your request. Nothing is charged, and you are not committed to anything.
- We contact you to confirm the price, the sensors you need and delivery.
- Your kit arrives with a hub, a remote and your sensors, ready to set up with the app.
Request received
Thank you. We have your request.
We will contact you soon to confirm the price and delivery. Keep this reference in case you need to ask about it: