The Updates features allows you to update the device firmware of your Bluefruit LE hardware over the air. This makes it easy to keep your device firmware up to date.
You’ll first be presented with a list of compatible firmware versions. Choose the one you want to use (you'll usually want the newest one at the top of the list).
You’ll then be asked to confirm the update process. After tapping Ok, the process will begin. Once the update process is completed, the app will automatically disconnect from the device and the device will reboot.
You can also update your device with an your own unlisted firmware by tapping the Use Custom Firmware button. You’ll be asked to locate the relevant file (iOS users can access files via iCloud) and then update process will begin as above.