iOS vs Android Betting on NZ Sites
iOS (iPhone, iPad)
Apple's App Store is strict on gambling apps and most offshore bookies aren't listed in the NZ store. The way around that is dead simple: open Safari, go to the bookie's mobile site, tap Share, then 'Add to Home Screen'. You get an icon on your home screen that opens the site fullscreen - basically a native app experience without the install. PWAs (Progressive Web Apps) make this work even better.
Android
Android gives you more options. You can use the mobile site (same Add to Home Screen trick works in Chrome), or download the bookie's APK directly from their site. Sideloading APKs requires enabling 'Install from unknown sources' in Settings, then trusting the bookie. Most major offshore sites offer APK downloads with proper SSL certificates - they're safe as long as you're getting them from the official site, not a third-party mirror.
Honestly, on both platforms the mobile-site-saved-to-home-screen approach is what we'd recommend for most users. Always up to date, no install hassle, and the modern PWA tech makes it indistinguishable from a native app for 95% of what you'll do.