The West, but not down south from home base for some reason?
Nintendo made a point of emphasis in their recent shareholder presentation about using apps to connect with fans, and another one has expanded its reach overnight.
A new app called "Nintendo Store" has dropped on the Apple App Store (iOS) and Google Play store (Android) after previously launching in Japan under the name "My Nintendo". The app serves as an interface for the eShop as well as tracking game play history dating back to the 3DS.
For reasons unknown, the application is not listed in Australia as of press time.
That's intentional. Separate apps mean easier development, maintenance, and deployment. If everything was on a single app, code changes could break existing functionality in other parts of the app requiring a ton of regression testing before release. As separate individual apps, Nintendo can roll out bug fixes and improvements much faster.
TL;DR: You should want separate apps. If one app fails, it won’t take the other functionality down with it, and it's much easier to fix.