Not every pick is sold in every country. These are the things that make the difference, so you can spot the finest in your own store.
Robot vacuums: the dock decidesA self-emptying, mop-washing dock is what makes a robot truly hands-off. Check its height under your sofa too.
Obstacle avoidanceCamera or structured-light avoidance stops the robot eating cables and socks.
Air purifiers: CADR and room sizeChoose a CADR (clean air delivery rate) that suits your room, and a true HEPA filter. Check filter prices before you buy.
IonisersSome purifiers have an ioniser that can make a little ozone. Choose one you can switch off.
Universal remotes: device supportCheck the remote lists your TV, soundbar and air conditioner, and whether it controls Bluetooth and Wi-Fi devices, not only infrared.
Smart lights: hub or Wi-FiWi-Fi bulbs are fine for one or two lamps. For a whole home, a hub (Zigbee or Thread) is faster, keeps lights off your Wi-Fi and works without the internet. Check the bulb fitting (E27, E14, GU10) first.