I got this off the Pioneer usa website.
Updating the firmware of your AppRadio2 (SPH-DA100) will result in the following changes:
• An “App Connection Settings†heading will be added to the “System†setting menu. This setting is
necessary in order to use AppRadio Mode with an iPhone with Lightning connector.
• The [Apps] icon on the Home screen will be changed.
So if you already have an "App Connection Settings" on your HU, you're on 8.30. If not, and you have {Caution} in brackets when you activate the backup camera, you're on 8.17. If you have no brackets around Caution, then you're on 8.14.