Anna Gora

A roll-call of the 10 best fitness trackers including budget buys, high-end smartwatches and even a smart ring

Smart rings vs smartwatches: Which fitness tracker wins for accuracy and functionality? The answer may surprise you.

We have tried and tested the Vitesy Eteria, a personal air purifier that uses a washable photocatalytic filter instead of replaceable HEPA filters. Our verdict? It is a real treat for the eco-conscious, but its performance leaves much to be desired.

The best smart scales can provide a better insight into health and fitness, from body fat percentage to bone density.

These are the best electric toothbrushes we’ve tested, including top models from Oral-B and Sonicare.

Capture pollen, dust, pet dander and more with the best air purifiers we’ve tested.

We have tried and tested the innovative SwitchBot air purifier table: it is an excellent multi-purpose appliance for people with seasonal allergies and a complete game-changer for pet owners.

The Morento MR5866 Smart Air Purifier is one of Amazon's bestsellers, and we can see why. It is quiet, efficient and costs less than $100 — an excellent choice for the upcoming hay fever season.

Tracking exercise performance does not have to cost the earth ― here are the best budget fitness trackers to invest in, tried and tested by the Live Science team.

Everything you need to know about photoplethysmography (PPG), the technology behind heart rate measurements in fitness watches and smart rings.