You switch out the map app like this, same way you change the default app for anything else: https://360.here.com/2015/01/29/swap-google-maps-here-androi... (The instructions for switching to, say, Google's own Waze app are pretty much the same too.) This is as I understand it not possible on Apple's iOS; even if you install a third-party mapping application, everything else on the system which opens up a map will still use Apple's map.