For even cheaper options, head to TechRadar's best budget robot vacuum guide. If you're in the UK, our favorite budget model is the outstanding Xiaomi X20+.Why we love it: Its whole-machine filtration helps keep allergens from escaping and the V15 Detect automatically increases the suction and speed of the brush roll to match the floor type and amo

You can also use the app to access the camera on the vacuum and see where it is in real-time – handy if it has got stuck or you want to check up on your pet (you can guide it remotely, too). We were impressed with how clear this image was.A HEPA filter is a special high-performance filter that traps 99.97% of particles down to 0.3 microns in size