App Overview

NZ Topo50 South Island icon

NZ Topo50 South Island

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This app provides complete offline topographic map coverage of the South Island of New Zealand from the LINZ Topo50 1:50k scale map series

$3.99 · In-app purchases

PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.1
9 ratings · Top 30%

Evidence scope: No current overall US chart position is available. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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What's included17 files

A product spec, phased build plan, differentiation notes, and screen references.

  • START_HERE
  • AGENTS
  • EVIDENCE
  • SPEC
  • BUILD_PLAN
  • DIFFERENTIATION
  • skills/
  • screens/
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Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.

Feature spec

Goal: Send a clear invoice after finishing a job.

  • Add a client, line items, a due date, and payment instructions.
  • Preview the total before exporting a PDF.
  • Keep an editable draft if export fails.

Screen plan

Invoice editor: Client at the top, editable line items in the middle, total and preview action at the bottom.

States: Empty draft, validation errors beside each field, exporting, and a retry action that preserves the draft.

Differentiate and validate

Hypothesis: Contractors need faster repeat invoices more than more templates.

First experiment: Test duplicating a previous job with five contractors. Watch where they hesitate before expanding the feature set.

The full kit adds a phased build plan, evidence notes, tool prompts, and implementation guidance. It is a plan for your coding agent, not a finished app.

Usage: Mechanics are fair game; never reuse the original name, branding, assets, or verbatim copy.

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Quick prompt

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for NZ Topo50 South Island: map the core Navigation workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
            

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Opportunities

AI-GENERATED OPPORTUNITY HYPOTHESES

These are generated suggestions, not verified review quotations. Check current App Store reviews and speak with users before treating a possible gap as a requirement.

Hypothesis 1

Provide enhanced offline map features with user-friendly download options.

Assumption to check: Limited offline map functionality

Validate with people who use this workflow before building.

Hypothesis 2

Implement a more robust search algorithm to improve location discovery.

Assumption to check: Inadequate search results

Validate with people who use this workflow before building.

Hypothesis 3

Simplify navigation controls for a better user experience.

Assumption to check: Difficult navigation controls

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to customize map layers and markers for a personalized experience.

Assumption to check: Limited customization options

Validate with people who use this workflow before building.

App evidence

Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.

App Store description

This app provides complete offline topographic map coverage of the South Island of New Zealand from the LINZ Topo50 1:50k scale map series. The maps are all contained in the installation so there is no additional need for downloads, no need for phone or wifi signal, no slow server issues, no account signups, no missing tiles, and no additional map fees. Just install for seamless off-line zooming and panning across the whole island down to 1:50k scale. The app also includes 1:50k resolution satellite images for the island, and elevation data. Additional aerial imagery and vector map can be downloaded. Other integrated data includes DOC hunting permit boundaries, DOC huts, campgrounds, and tracks, Fish and Game access points, Te Araroa trails, Public Conservation Land boundaries, selected public road parcels, weather forecasts, and many more. The app has a full suite of navigation functions including GPS location, compass orientation, distance to map locations, track recording and graphing, route creation and following, hillshade and slope angle overlays, import/export of gpx and kml files, search functions for named places and user data. Add and edit your own locations and routes and plot elevation profiles. Set proximity alarms. Live location sharing. Use your camera view to identify surrounding peaks and match with local topography. Uses an intuitive simple interface with one-touch access to all functions. LINZ TOPO250 series maps are used at lower zoom levels for easier navigation. Perfect for outback use out of cell phone range. GPS and maps function fully without phone coverage. No need to cache files in advance either as they are all fully installed with the app. Popular with trampers, hikers, runners, bikers, search and rescue (SAR), hunters, boaters, flying, paragliding, as well as survey applications. Note that continuous use of GPS will run down the battery faster than when not using the GPS. The NZTopo50 app gives you full control over when GPS is used. The map can be used without GPS, intermittently with GPS for spot checking of location, continuously for logging while the app is open, or for continuous background logging when the phone is off. Check our website for links to user guides and useful tips and tricks. The in-app purchases are for an optional contribution to ongoing app development, or for selected additional third party data sets. They don't affect the functionality of the app or the availability of updates. Feel free to get in touch with any suggestions.

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Screenshots

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Build scope

Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.

Define the first version

Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.

Set boundaries

Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.

Check the hard parts

Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.

SUGGESTED BUILD STACK
React Native
Expo
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react-navigation
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BUILD KIT DIFFICULTY
Advanced

From the Build Kit assessment.

A reliable timeline needs an agreed scope and a technical check. Ask your agent to estimate the phases in BUILD_PLAN.md after that review.