How Fall Detection Technology Works

Falls are the leading cause of accidental death in people over 65 in the UK. According to NHS statistics, around one in three people over 65 will experience a fall each year — and for those over 80, the figure is closer to one in two. Many of these falls happen at home, when nobody else is around.

For families, the worry is always the same: what happens if mum falls and can’t reach the phone? What if she’s unconscious, or too confused to press the alarm button?

That’s exactly the problem fall detection technology is designed to solve. It automatically calls for help when it senses a fall — even if your parent can’t press a button themselves. In this guide, we explain how it works in plain English, which UK devices have it, what it costs, and where its limitations lie. No jargon, no sales pitch.

What is fall detection?

Fall detection is an automatic system built into certain personal alarm pendants, wristbands, and smartwatches. Unlike a standard personal alarm — where your parent needs to press a button to call for help — fall detection does it for them.

Here’s the key difference. A standard personal alarm is brilliant if your mum trips in the kitchen and can reach for her pendant to press the SOS button. But what if she hits her head on the way down and loses consciousness? What if the shock and confusion of the fall means she forgets what the button is for? A standard alarm can’t help in those situations. Fall detection can.

The technology is particularly important for people who:

• Live alone — there’s no one nearby to notice a fall or call 999
• Have dementia or cognitive issues — they may not remember to press the button, or may not understand why they need to
• Are at high fall risk — conditions like Parkinson’s disease, osteoporosis, or a history of previous falls
• Have poor mobility — unsteady on their feet, use a walking frame, or have balance problems
• Take medication that causes dizziness — blood pressure tablets, sedatives, and some painkillers all increase fall risk

Fall detection doesn’t replace the manual SOS button — it works alongside it. Think of it as a safety net. Your parent can still press the button whenever they need help, but if they can’t, the device takes over automatically.

How does fall detection actually work?

The technology behind fall detection is clever, but the concept is straightforward. Here’s what happens, step by step, from the moment your parent falls to the moment help arrives.

1. Sensors detect movement
   Inside the pendant or wristband are tiny sensors called accelerometers and gyroscopes. Accelerometers measure acceleration in all directions — up, down, forwards, backwards, sideways. Gyroscopes track rotation and orientation. Together, they create a detailed, real-time picture of how the body is moving. These are the same sensors found in your smartphone.
2. The algorithm analyses the pattern
   A small processor inside the device runs software that continuously compares the sensor data against known fall patterns. A real fall has a distinctive signature: sudden downward acceleration, a sharp impact, and then a period of stillness or very limited movement. The algorithm is looking for this exact sequence and can distinguish it from normal activities like sitting down or bending over.
3. The device confirms a fall
   Before triggering an alert, the algorithm runs through a checklist. Was there rapid acceleration beyond normal movement? Was there a sudden impact? Is the person now in a horizontal position or motionless? Some advanced devices also use a barometric pressure sensor that detects the change in air pressure when someone drops from standing height to the floor — adding another layer of confirmation.
4. Alert countdown starts
   To avoid false alarms, most devices start a countdown — typically 30 seconds. The pendant will vibrate, beep, or flash to let your parent know it’s detected something. If it was a false alarm (perhaps they sat down a bit too hard), they can press a button to cancel. If they don’t cancel, the device assumes they need help.
5. The response centre is contacted
   If the countdown expires without being cancelled, the device automatically contacts the 24/7 monitoring centre. It sends the alert along with the user’s details and, if the device has GPS, their location. This all happens without any input from your parent.
6. Help is dispatched
   A trained operator at the response centre opens a two-way voice call through the pendant’s built-in speaker and microphone. They’ll try to speak to your parent and assess the situation. Depending on what they hear, they’ll contact your nominated family members, a keyholder, or the emergency services on 999. If there’s no response at all, they assume the worst and send help immediately.

What about false alarms?

No fall detection system is perfect. The typical false alarm rate is around 5–15%, depending on the device and the person wearing it. Common triggers for false alarms include:

• Sitting down heavily into a chair or sofa
• Bumping into furniture or a doorframe
• Dropping the pendant onto a hard floor
• Vigorous activities like gardening or reaching for high shelves
• Bending down quickly to pick something up

While false alarms can be a nuisance, most families agree they’re a small price to pay for the peace of mind. The 30-second cancellation window catches most of them, and response centre operators are trained to handle them calmly and quickly.

How algorithms are improving

Modern fall detection algorithms are significantly better than those from even five years ago. Many now use machine learning, which means the software has been trained on thousands of real fall recordings and everyday movement data. Some devices also combine accelerometer data with a barometric pressure sensor (which detects the height change as someone falls from standing to the floor), making the detection more accurate and reducing false alarms.

The technology continues to improve year on year. Each generation of device is better at telling the difference between a genuine fall and someone simply living their normal life.

Which UK alarms have fall detection?

Not all personal alarms include fall detection. Below is a comparison of the most popular UK devices that do offer it, along with their monthly costs and key features. We’ve tested or thoroughly researched every device on this list.

Taking Care GPS Pendant

Our top recommendation for most families. The Taking Care GPS Pendant combines fall detection with GPS tracking, so it works anywhere — at home, in the garden, at the shops, or on a walk. The fall detection is built in (not an add-on) and the 24/7 response centre is UK-based and TEC Services Association (TSA) accredited. At £24.99 per month with no long-term contract, it offers excellent value for a GPS device with fall detection.

Oysta Pearl+

A solid alternative to Taking Care, the Oysta Pearl+ is a discreet GPS pendant with reliable fall detection. It’s slightly more expensive at £25–30 per month depending on the plan, but some families prefer its design and the Oysta app for family tracking. It also includes two-way voice calling and an SOS button.

Telecare24 Vi-Sense

If your parent rarely leaves the house, the Telecare24 Vi-Sense is a cost-effective home-only option at £19.99 per month. It connects through a base unit plugged into the phone line or broadband, and the fall detection pendant works throughout the home — typically within 50–100 metres of the base unit. A good choice for those who want fall detection without paying for GPS they won’t use.

Lifeline24 SureSafe

The most affordable option on our list, starting from just £12.95 per month for the basic plan. Fall detection is available as an add-on rather than being included as standard, which means you can start with a simple manual alarm and upgrade later if needed. The SureSafe pendant is lightweight and waterproof, and the 24/7 monitoring centre is UK-based.

Apple Watch Ultra 2

The Apple Watch is worth mentioning because its fall detection feature is genuinely good — Apple has invested heavily in the technology. However, it’s a very different proposition from a traditional personal alarm. There’s no monitoring centre; instead, it calls your emergency contacts or 999 directly. It also requires an iPhone, regular charging, and a degree of tech-savviness that not every older person has. At £699 as a one-off purchase, it’s best suited to tech-comfortable older adults who already use Apple products.

Fall detection vs manual alarms

Choosing between fall detection and a standard manual alarm depends on your parent’s needs, health, and living situation. Here’s a clear breakdown of the three main options.

Limitations to know about

We believe in being honest about what this technology can and can’t do. Fall detection is genuinely useful, but it isn’t magic. Here are the limitations every family should understand before buying.

It’s not 100% accurate

Fall detection works best for sudden, hard falls — the kind where someone trips and hits the ground quickly. It’s less reliable at detecting “soft” falls, like slowly sliding off a sofa or gradually slumping in a chair. These gentler falls don’t produce the dramatic acceleration and impact that the sensors are looking for. Modern devices have an overall accuracy rate of around 85–95%, which is very good but not perfect.

False alarms happen

Expect a false alarm rate of roughly 5–15%. Common triggers include sitting down heavily, bumping into furniture, or dropping the pendant. While the 30-second cancellation window catches most false alarms, some will get through to the response centre. This isn’t a disaster — operators are trained to handle them — but it can be annoying, and some older people find the beeping stressful.

Battery drain is real

Fall detection requires the sensors and processor to be running constantly, which uses more battery power than a simple manual alarm. Home-based pendants connected to a base unit typically have battery life measured in years, so this isn’t a concern. But GPS pendants with fall detection need charging every one to three days. If your parent forgets to charge it, it won’t work. Consider setting up a daily charging routine — perhaps plugging it in every night beside the bed.

Range matters

Home-only devices work within range of their base unit — typically 50–100 metres. This usually covers the entire house and a small garden, but it won’t work at the bottom of a large garden, in a detached garage, or anywhere outside the home. If your parent is active and goes out regularly, a GPS device is the better choice, though it costs more.

Not every fall type is detected

So-called “long lie” falls — where someone gradually loses balance and slowly crumples to the floor — are the hardest for any fall detection system to pick up. The movement pattern is too similar to sitting or lying down deliberately. Similarly, a fall onto a very soft surface (like a thick carpet or bed) may not produce enough impact to trigger the sensor.

Cost

Fall detection typically adds £5–10 per month to the base cost of a personal alarm. For a home-only device, you might be looking at £20–25 per month instead of £12–15. For a GPS device, expect £25–30 per month. Some providers charge a one-off setup fee as well. It’s not cheap, but when you compare it to the cost of a care home (£3,000+ per month on average), it’s a fraction of the price for a technology that helps your parent stay independent at home.

Our verdict

After researching and comparing dozens of fall detection devices, our view is clear: fall detection is worth the extra cost for most families. It’s not perfect — no technology is — but it provides a critical safety net that a manual alarm simply can’t match.

We particularly recommend fall detection if your parent:

• Lives alone — there’s nobody to notice a fall or call for help
• Has had previous falls — a fall history is the single strongest predictor of future falls
• Has dementia or cognitive issues — they may not remember or be able to press the SOS button
• Is unsteady on their feet — uses a walking aid, has balance problems, or has conditions affecting mobility

For most families, we recommend the Taking Care GPS Pendant as the best all-round option. It combines reliable fall detection, GPS tracking, a manual SOS button, and a UK-based 24/7 response centre — all for £24.99 per month with no long-term contract. It’s the device we’d recommend to our own families.

Frequently asked questions