Question: what is the difference between fitbit aria 2 and aria air?
Answer: While the Aria 2 connects via Wi-Fi or Bluetooth, the Aria Air does so only via Bluetooth to your phone. ... The Aria 2's Wi-Fi setup means you don't need your phone nearby. You just step on the scale (where it recognises each user by approximate weight), and it sends the reading to your Fitbit account database.