The native App Store app is very basic, but It does support the ability to stream your camera's output to a remote computer, with the option to enable the Torch light.
While screen share support is available in-app, it currently only works when the app is open, making it a bit useless if you need to switch apps. If you're looking to screen-share from an iPhone or iPad with VDO.Ninja, other ways to do it exist. See this guide here: