The Fitbit did sleep tracking like no other device I’ve used. That was the ONLY thing that it did right. Fitbit is garbage. Every Fitbit I ever had died about six month after the warranty ended. And the most they would offer is a coupon for 20% off another Fitbit. Talk about an abusive relationship. I’d been a customer of theirs since the very first step tracker they put out but I finally had to move on to Garmin. And then I got an iPhone and the rest is history. I now use an AW8 and an Ultra 2.
Oh, and the Fitbit also kept the time pretty well.