Once your scale is set up on your wireless network, it will automatically sync directly to your router every time you weigh yourself.
After stepping off your scale, you should see a check mark. This indicates that syncing is complete. You can then view your data by logging into your Fitbit.com account through your computer, smart phone, tablet, or other smart device.
In order for your information to be sent to Fitbit, you don't need to use the computer or smartphone you used for setup.
If you're having difficulty syncing, see My Aria scale is not syncing consistently