The Fitbit started out as good, useful tool. Then they sold out to the insurance companies. Now? The only info that I trust from my Fitbit now, is the heart rate info, and steps. My first one was accurate and showed that I had a 61 resting HR, and was doing 30 min cardio. Then one day, it received a big update. Within the week my resting HR had increased to 71. Even though the graph showing my 24hr HR was still the same.
So, when the band's attachment point broke, I just put it in a drawer. My wife, thinking that I liked my Fitbit, got me a newer/better one for Christmas. Oh yay.
She meant well, so I wear it. But the info is still suspect. There's been yet another software update. It doesn't log any cardio until my HR reaches 129 bpm. That is the lower range for a 35yr old. The max HR for a 59 yr old is 129bpm. (yes, I verified that the device has my correct age) And, if I wake up "too far", it won't log my sleep. It says you have to sleep for at least 3hrs to get an accurate collection. It wasn't like this until the last update.
I am on my 3rd new Fitbit this year. They have just stopped working. They have sent me replacements without issue. But once the year warranty is up, I'm sure that will change. What I don't understand . . . . they don't want the broken ones back. I have asked each time, what to do with the bad one. They say that info will be on your confirmation email.
It's not. My last replacement was lost in transit; 2 weeks overdue. They sent me another complete fully filled box. The previous replacements had been just the data device. About a month after that, the missing device showed up; no return instructions. How, or more accurately why, do you stay in business giving devices away without having the broken one returned?
During my attempts to locate a method of returning the broken one, I located a link to pair your device to your insurance company. This explains the supposed increase in resting HR and my supposed poor sleep. Those are both poor health indicators, which the insurance companies use to justify higher premiums.