I just saw an ad for a "fitness" band you evidently wear around your wrist so you can tell if you are exercising or not. It also monitors your sleep and tells you how much you got or not.
You know whether you are exercising or not. You also can look at a clock before you go to sleep. But some will be fooled into adding this layer of decision making to their lives.
Decisions take time. To decide to buy it, to decide where to buy it, to shop for this device, to read the manual or software, to use it, to shop for batteries for it, to protect it, and to store it.
But how about this? Ignore it and save your decision energy. If you wonder where your time and life is going - check your decisions others are asking you to make daily.