A:AnswerYes it does track your sleep, heart rate but haven't seen anything about stress levels. I really like it a lot because it helps keep me on track plus it's synched to your phone once you download the Fitbit app.
A:AnswerThe fit bit has a basic calories burned calculation. The companion app has a food logger. You can set a goal and have it auto compare the two and it will keep you updated, but I no longer remember if that is a function of the premium membership that costs more.
A:AnswerThe Fitbit hr is what you are looking for, it keeps count of your daily steps, your heart rate, along with tracking your sleep. I purchased the Fitbit hr for my parents and they are very pleased. Fitbit hr is very easy to setup and use. The battery last for 5 days before you have to recharge. I give this product a 5 star rating!