I haven\'t found a thread about this so I must ask: is there a way to programmatically detect which app store the app was downloaded from? (ie: Germany App Store)
If you have In App Purchases you can check the priceLocale of your SKProduct, which gives you the store (currency and country) the user currently is logged in.
Apple recommended this at WWDC2014 Session 303 Optimizing In-App Purchases at 10:30.