A variety of Travel Apps for smartphones and tablets (Android and Apple).  Some will be free or a fee is charged. 

Essential New Zealand App =  http://www.newzealand.com/au/utilitie... 

New Zealand in your Pocket = https://itunes.apple.com/nz/app/itrav... 

Useful New Zealand Travel Apps = http://www.acrossnz.com/useful-travel...

Best Free Travel Apps = http://www.nzherald.co.nz/travel/news...

Pocket Wi-Fi in NZ 

Apple = http://www.top10travelapps.com/search...

and

Android = http://www.bestravelapps.com/search/N...