App Overview

Land Nav Assistant icon

Land Nav Assistant

Gammon Applications, LLC · Navigation

Land Nav Assistant accepts MGRS (Military Grid) or Latitude / Longitude coordinates and visually navigates you to each point.

$2.99 · In-app purchases

PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
73 ratings · Top 15%

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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> SELECT BUILD PLATFORM:

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

// RORK SYSTEM PROMPT
Rork plan preview for Land Nav Assistant: 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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App evidence

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

Screenshots

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App Store description

Land Nav Assistant accepts MGRS (Military Grid) or Latitude / Longitude coordinates and visually navigates you to each point. This app was designed with Army, Marine, and other military personnel in mind. Use it to correct your Land Nav technique by analyzing your pace count and tendency to veer left and right. Available Input: 8 digit MGRS, 10 digit MGRS, Lat/Lon decimal, Lat/Lon dms, and map input. Angles: degrees or mils Distance: meters/km or feet/miles Speed: kph or mph Use the simple arrow interface or map to direct you to your locations. Your distance, direction, speed, and bearing are shown as you navigate. Long-tap anywhere on the map to get the coordinate for that location. Easily add locations via the Map interface. Plan your course by ordering points, or use the course optimization tool which will help you calculate the shortest path possible! Get distance/direction between two points by tapping the path drawn between them. Satellite, Terrain, Road, and basic Topographic maps show you, your locations, and lets you enter in new ones. Overlay a 1000m or 100m MGRS grid anywhere on the map. Displays distance/direction from your currentl location to all points, or between any two points. Download your Locations as a spreadsheet to save anywhere, or to share with anyone you choose. Import a large set of locations via the web import utility, available at: https://www.gammonapplications.com/land-navigation-services/import This app uses the Military Grid Reference System (MGRS) and Latitude / Longitude. Choose to display your locations as MGRS 10-digit, MGRS 8-digit, or LatLon Decimal. D:M:S can be input in the format DD:MM:SS followed by the appropriate direction (NSWE). Default direction is N, W. DO NOT use this application while learning Land Navigation. Land Navigation is a valuable skill, and should be mastered before using this application. Do not rely solely on this application for navigation, especially when lost. Always be aware of your surroundings.

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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

Implement a more robust offline map and routing feature.

Assumption to check: Limited offline map features compared to competitors

Validate with people who use this workflow before building.

Hypothesis 2

Optimize search with faster API calls and caching.

Assumption to check: Search functionality can be slow

Validate with people who use this workflow before building.

Hypothesis 3

Enhance location accuracy with user feedback and better mapping data.

Assumption to check: Occasional inaccuracies in location data

Validate with people who use this workflow before building.

Hypothesis 4

Add voice command features for hands-free navigation.

Assumption to check: Lacks voice command integration

Validate with people who use this workflow before building.

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
react-native-maps
axios
zustand
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.