A solution in search  of a problem.

Note that sales of Apple Watches have plummeted. Why? It's just not necessary. An expensive gimmick.

I know, personally, of only one person who owns an Apple watch. It was given to her by her husband at xmas last year. She never wears it. Never. Says it's too clunky, too ugly and is utterly superfluous to her life.

He should have bought her flowers instead.

FitBits are no different. A gimmick with some "cool" factor that lasts, oh, maybe 30 days. Beyond that, it's just another useless thing.