An anonymous reader writes "The Guardian reports on research (PDF) into the (alleged) wearable device trend: fully one third of customers who bought one stopped using it within six months. Activity trackers fared even worse: half of them are collecting dust. 'For comparison, you wouldn't find people from the early days of the smartphone saying that they'd abandoned their BlackBerry, Treo or Windows Mobile or Symbian phone. They were the early adopters, and they found utility in having email and (sometimes) web pages on the move. The idea of giving them up just wouldn't occur to them. ... So far, there aren't clear signs of quite what it is that smartwatches and fitness trackers are replacing, in the way that [early] music players did. Useful new technology has to replace or simplify some function, ideally; otherwise it has the challenge of persuading us that we need this entirely new thing. Smartphones are simpler ways to collect your email – and also make phone calls and surf the web (and so on). Fitness trackers... let you track your fitness. But given that 41% of people run with their smartphones, you might get by with a movement tracking app instead. The trouble with devices that claim to track your steps is they're so easily hoaxed by waving your arms around.'"