According to the latest info, New Zealand Topo Maps is rated 4.7 on Google Play. There are in-app purchases and ads in the tool. Samsung and Sony users like this application.
You can get the .apk installer of New Zealand Topo Maps 4.5.1 free free of charge and have a look at users' reviews on Droid Informer. This file size doesn't exceed 5 MB and the app runs flawlessly on Android 4.1 and higher.
According to the users’ comments, the significant advantage of the app is useful features, but some people highlight that this application has such a disadvantage as a battery drain.