That's all you need to do to make Google Maps the default navigation app on your iPhone. Presumably, other navigation apps will appear in the list, so you can switch to something else.

You can now set Google Maps as your default navigation app – but only in the EU As noted by Macerkopf, Google Maps now appears as an option in the default navigation app settings on iOS.

Two new apps will enable blind people to navigate indoor buildings with spoken directions from a smartphone app, providing a safe method of wayfinding where GPS doesn’t work.