Smart home gadgets are easy to buy and surprisingly easy to get wrong. A smart bulb that won't talk to your voice assistant, a camera that hides key features behind a subscription, or a sensor that needs a hub you don't own can turn a small purchase into a frustrating one. A few checks before you order avoid most of that.

Start with your ecosystem

Most homes end up centred on one app or voice assistant. Before you buy anything, decide which one you'll use to control everything, then check every device against it.

  • Look for "works with" information on the product page that names the platform you use.
  • Check the app. Some devices need their own app for setup even if you control them elsewhere afterwards.
  • Think about the whole household. If people in your home use different phones, check the device works with all of them.

The connection standards, in plain English

Smart devices talk to each other and to your network in different ways. You don't need to understand the technology, but you do need to know which one a device uses.

StandardHow it worksWhat to check
Wi-FiConnects straight to your home routerMany routers handle only so many devices well; some devices only use the 2.4GHz band
BluetoothShort-range connection to your phone or a nearby deviceRange is limited; remote control may need an extra bridge
Zigbee and Z-WaveLow-power networks for sensors, plugs and lightsUsually need a hub or bridge; Z-Wave frequencies differ between the US and UK/Europe
ThreadLow-power network that many newer devices useNeeds a "border router", often built into some smart speakers and hubs
MatterA shared standard designed so devices from different makers work across platformsCheck the device and your controller both support it, and which version

Matter is worth looking for if you want flexibility, because it's designed to let one device work with several ecosystems. Support is still uneven across device types, so read what the listing says it can actually do through Matter.

Do you need a hub?

A hub (sometimes called a bridge or controller) connects devices that don't use Wi-Fi to your network.

  • Check whether the hub is included or sold separately. "Requires hub" in the small print is easy to miss.
  • See if you already own one. Some smart speakers, displays and routers can act as a hub for certain standards.
  • Count the cost. A cheap sensor plus a hub you have to buy may cost more than a Wi-Fi alternative.

Watch for subscriptions

Some devices work fully out of the box. Others keep features such as video history, smart alerts or professional monitoring behind a monthly or annual fee.

  • Read the "plans" or "subscription" section of the product page before you buy, not after.
  • Check what works without a plan. Live view only? No recorded clips? Limited alerts?
  • Look for local storage options, such as a memory card slot or a home hub that stores recordings.
  • Add the yearly cost to the purchase price when you compare devices.
  • Note when any free trial of a plan ends, so it doesn't renew without you deciding.

Privacy settings to change on day one

Cameras, doorbells, microphones and even some plugs collect data. When you set a device up:

  1. Use a strong, unique password for the account and turn on two-step verification if it's offered.
  2. Review microphone, camera and location permissions in the app.
  3. Check what's shared for analytics or "product improvement" and switch off what you don't want.
  4. Set recording zones and schedules for cameras so they don't capture neighbours or indoor spaces you'd rather keep private.
  5. Install firmware updates. Look for a maker that publishes how long devices will receive security updates.

Be considerate about cameras and doorbells that point beyond your property; rules on recording neighbours and public spaces vary, so check what applies where you live.

Returns and longevity

  • Check the returns window, as compatibility problems often only show up once you've installed something.
  • Keep the packaging until you're sure everything works together.
  • Buy from a store with a clear returns policy. Our refunds and chargebacks guide explains your options if a seller won't help.
  • Watch out for regional versions if buying from abroad, especially for Z-Wave devices and plug-in items; see buying electronics from abroad.

The short version

Pick one ecosystem and check every device against it, know which connection standard each device uses and whether it needs a hub, read the subscription details before buying, lock down privacy settings on setup, and keep the box until everything works together.