To use a Garmin Vivofit, unbox the item and download Garmin Express from GarminConnect.com. Remove the ANT stick from the package and insert it into your computer's USB port. Depress the button on your Vivofit, and release it once "PAIR" appears on the screen. Open Garmin Express to complete setup.
Alternatively, you can sync your Vivofit with your mobile device. Vivofit is compatible with select iOS and Android devices. Check your device's compatibility on Garmin.com. If the device is compatible, download the Garmin Connect Mobile application, and place the device within 10 feet of the Vivofit. Make sure that Bluetooth is enabled on the device. Open the Garmin Connect Mobile application on your device, and touch "Menu," then "Devices," "+," "Health & Fitness," then "vivofit" or "vivofit 2."
Next, input personal information in the indicated fields. This helps the watch assign you an appropriate daily goal based on your activity levels. Touch "Next," then hold down the device key on the Vivofit until the word "PAIR" appears on the screen. Access the Garmin Connect Mobile application on your device and touch "Start." After verifying that the passcode in the app matches the passcode displayed on the watch screen, touch "Yes." Once initial synching is complete, touch "Done."