07-02-2016 13:57
07-02-2016 13:57
07-02-2016 16:06
07-02-2016 16:06
Hello @Kejuneau,
Welcome to the community!
The iPhone 4 does not have bluetooth LE. It was introduced on the iPhone 4S. Thus your iPhone 4 cannot communicate with your Fitbit.
I hope this helps.
Frank | Washington, USA
Fitbit One, Ionic, Charge 2, Alta HR, Blaze, Surge, Flex, Flex 2, Zip, Ultra, Flyer, Aria, Aria 2 - Windows 10, Windows Phone
Take a look at the Fitbit help site for further assistance and information.