App Overview

GPS WIZ icon

GPS WIZ

Digilog Corporation · Navigation

This is a very powerful map tool which lets you accurately measure distances, remember locations, get magnetic headings between selected points and much more

$4.99 · In-app purchases

PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet

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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Build Kit

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A product spec, screen plans, and build steps for your coding agent.

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What's included16 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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Free quick prompt For a smaller starting point

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 GPS WIZ: 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

Focus on a clean, minimal interface with easy-to-access features.

Assumption to check: Users often find navigation apps to be cluttered and hard to use.

Validate with people who use this workflow before building.

Hypothesis 2

Incorporate offline maps and routing features.

Assumption to check: Many navigation apps lack offline capabilities.

Validate with people who use this workflow before building.

Hypothesis 3

Implement high-quality TTS and clear voice prompts.

Assumption to check: Voice navigation can be unclear or unreliable.

Validate with people who use this workflow before building.

Hypothesis 4

Utilize real-time traffic data to improve routing accuracy.

Assumption to check: Traffic updates may be inaccurate or not real-time.

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 is a very powerful map tool which lets you accurately measure distances, remember locations, get magnetic headings between selected points and much more. GPS WIZ is a powerful navigation and measurement tool that uses GPS maps in a variety of ways. Pan and zoom on the map to locate and display your coordinates in both decimal degrees and degree minute second formats. Save selected locations in permanent memory using a Site List with your own specified name for each site. Display these sites anytime by selecting them. Add control zones for your airport entries and they will automatically display on the map for the area you choose to view. Airport zones are color coded for UniCom, Mandatory Frequency (MF) and Class-C zones. Create and save trips which specify unique routes with your own waypoints in a Route List, either directly from the map or selected from your saved sites. Display your route on the map with a pin located at each waypoint entry. The map is auto scaled to fit the full trip onto your screen. Touch the pin to identify that point. The total route distance will be calculated and shown automatically but you also have the ability to measure each leg distance and leg heading (in degrees magnetic) by simply pressing the Leg button. This is useful for pilots to estimate fuel requirements or for hikers to estimate walking times between waypoints. True bearing is calculated from spherical geometry using latitudes and longitudes. The World Magnetic Model (WMM) is used to calculate magnetic declination and magnetic bearing and any point. A pin drop feature lets you measure distances from your current location to where you drop pin 1 and the distance between pin 1 and pin 2 so you can measure interesting map features quite accurately. This is a powerful feature for pilots to determine takeoff and landing distances on remote airports, grass strips and lakes for floatplanes. Moving the map automatically draws a line from your current position to the centre of the target. Both distance and magnetic bearing are displayed. By placing the target on any point of interest, you automatically get a distance and bearing to that point from your current location. Placing pin 1 on a point of interest (e.g. airport) then moving the map to another point of interest (e.g. another airport) gives you the distance and bearing between these points. This feature is very helpful when estimating destinations or finding your way out of a forest, or even a large crowded mall. A wide variety of users from builders, architects, pilots and boaters to crane operators will find this feature very useful. There is no annoying advertizing. The APP is full featured so no costly upgrades are required. Have fun with it. There is also a built-in Guide available to provide instructions on how to use the various features. The 2015 World Magnetic Model is a joint product of the United States National Geospatial-Intelligence Agency (NGA) and the United Kingdom’s Defence Geographic Centre (DGC). The WMM was developed jointly by the National Geophysical Data Center (NGDC, Boulder CO, USA) and the British Geological Survey (BGS, Edinburgh, Scotland).

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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
react-navigation
axios
expo-location
@react-native-async-storage/async-storage
BUILD KIT DIFFICULTY
Intermediate

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.