My two-year old FitBit One started having a problem last month where I would find it just off. Holding down the button would cause it to “boot” (showing “FITBIT 6.60”) on the screen but while it was off it wasn’t tracking any activity. It wasn’t a battery issue as far as I could tell as the app was reporting an accurate status. I tried working with FitBit support but since the unit was out of warranty, all they could offer was a 25% discount code towards the purchase of a new FitBit device.
After waffling between just getting another One, or upgrading all the way up to a fitness watch like the Blaze, I decided to try the Charge 2.