03-09-2016 12:16
03-09-2016 12:16
03-09-2016 12:43
03-09-2016 12:43
The dongle helped provide a Bluetooth connection between your Fitbit and your computer. Since your iPhone comes with Bluetooth, you don't need any external accessories to connect it to your Fitbit.
For the charts and graphs, they are slightly different on the iPhone app from fitbit.com. What specificially are you looking for with your heart rate? If you click on each individual item, you'll see more information about each. By clicking on the tile that shows your current (and resting) heart rate, you'll see a chart with your resting heart rate over the last 30 days. Then you can scroll day and see heart rate data specific to each day, much like you would see on the fitbit.com tile.