Smartwatches and fitness wristbands are now real all-rounders: they serve as heart rate monitors and altimeters, count steps, calculate distances travelled and calories burned, sometimes using GPS, and analyse sleep patterns. Some can be used to play music, make phone calls or send and receive messages...

Personally, I find that it is much more difficult to make a purchase decision in the smartwatch sector than in many other areas. Do you want an inexpensive model without any special features? Mobile internet, but a battery life of no more than one day? Or the best of the best for the price of a flagship smartphone?...