For sports or fitness, simple metrics like HR band based training or distance measuring simply work in many cases and lead to measurable improvements in health

For sports or fitness, simple metrics like HR band based training or distance measuring simply work in many cases and lead to measurable improvements in health or sporting ability over the course of a few months. Even before Apple watch came along, loads of cycling/running enthusiasts where taking advantage of metrics to train better via tools like GPS watches and ANT+ power meters. It works, if you apply yourself, and those devices couldn't even do calls or texts - thats frankly a bonus feature. I used dedicated Garmin devices for years, Apple have packaged it up and made it so pretty much anyone can take advantage. While no one in the absolute needs an Apple watch to lose weight or get fitter, for some people it works, so have at it, frankly. Friendly competition on strava.com has been great motivator for me at times in my life over the last decade - devices like apple watch are gateway to that world.