If you are using an Apple / iOS device, when downloading or updating the BraveGen App, if you get the message "Item not available in NZ store" or some other country you need to change the store region on your device.

item not available in particular app store for iOS

If you have the above screen, which has the Change Store option, just tap on that.

However, if you have dismissed that screen, go to Settings >> iTunes & App Stores. Here, you can find your Apple ID that is being used in your iOS device. Tap on that. You will get an option called View Apple ID.

View Apple ID settings in iPhone

Select it. Again you can find your Apple ID along with couple of options. Here, you can find Country/Region. Tap on it and select Change Country or Region.

Now choose your country. Following that, you may have to enter a postal address. Do enter it and save your settings. After that, you can install the BraveGen app that was previously unavailable in your App Store.