New Zealand is compact but remote. Cell coverage outside main towns can be unreliable, especially on the South Island. Download offline maps and pre-book transport for popular routes. Contactless card payments work almost everywhere, even in small towns.
Convert to NZD at real exchange rates without hidden fees. Particularly useful since New Zealand's currency can fluctuate quite a bit.
ANZ New Zealand's mobile banking app. If you open a local account, this gives you fast transfers, bill payments, and ATM locator features.