Remember the Jawbone Up? It got popular with early adopters around 2013, the same time Fitbit released their first on-wrist tracker. Everyone I know who had an Up lost interest within six months. Sure, the hardware was flaky, but the novelty wore off. I'm guessing the same thing happened with Fitbit, but they somehow powered through people losing interest with a bigger product lineup and more features. But still, the novelty wore off.

Funny enough, I have an Aria scale because that's a meaningful metric for me to track long-term.