How do I detect an app has been downloaded in China?

Question

I am looking for a reliable mechanism to find out if my application has been downloaded in China. What are my options?

There is an appStoreReceiptURL method on NSBundle which points to a DER encoded receipt file. I understand this receipt may also contain the country of the App Store where it was downloaded. Does anyone know how reliable that information is?

Are there other options?

Answer 1

For iPhones you can use this

CTTelephonyNetworkInfo *network_Info = [CTTelephonyNetworkInfo new];
CTCarrier *carrier = network_Info.subscriberCellularProvider;

NSLog(@"country code is: %@", carrier.mobileCountryCode);

//will return the actual country code
NSLog(@"country code is: %@", carrier.isoCountryCode);