MyNetDiary and PlateAI support linking with all of the Fitbit models. As long as your Fitbit device can send the collected data to your profile on the www.fitbit.com website and the www.fitbit.com website can show these records, MyNetDiary or PlateAI would be able to "read" them.
Linking Fitbit and our apps includes "reading" the data gathered by Fitbit Aria WiFi/Bluetooth weighing scales.