It works but it's frustrating

Good price, especially on sale and has all the basic features you need in a tracker-- heart rate monitoring, sleep tracking, exercise logging and step counting. Heart rate and steps are pretty accurate. Comfortable to wear all day and to bed- you barely feel it. However, the Fitbit app is a huge disappointment. Have had troubles with it from day 1. Sometimes days won't sync, sometimes the data is wrong, sometimes my sleep is not logged and I have never been able to access my fitbit settings. I have spent too much time troubleshooting and online searches reveal that the problems I experienced have existed for years. I have had to download and re-download the app on multiple devices. And yes, you need the app to use the Fitbit. So the Fitbit is nice when it works, but it's not reliable.