App Overview

MilGPS icon

MilGPS

Cascode Labs Pty Ltd · Navigation

MilGPS is a field navigation tool designed for efficient use by trained navigators using MGRS coordinates

$12.99 · In-app purchases

OVERALL US RANK
#37
Paid · all categories
REVENUE (Est)
$70K/mo
$40K - $99K
RATING
★ 4.8
5,543 ratings · Top 5%

Evidence scope: #37 is the current overall US Paid chart position. Category-chart positions shown in discovery are a separate scope. Revenue is a directional model estimate, not verified earnings.

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

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What's included18 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 MilGPS: 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

MilGPS is a field navigation tool designed for efficient use by trained navigators using MGRS coordinates. No in-app purchases or subscriptions. OVERVIEW - Display your current location and other info in large, clear text on customizable screens. - Create waypoints using your current location, map crosshairs, distance/direction projection or optimized coordinate entry. Organize waypoints into overlays and navigate to them by following an arrow or on the map. - Visualize your location and waypoints on a map with smooth scrolling grid lines/labels. Apple and Google online maps are included or supply your own offline maps in raster MBTiles format. OTHER FEATURES - Supports MGRS, USNG, UTM, Lat/Lon and OSNG location formats. - Supports a wide variety of map datums including WGS84, NAD27, OSGB36, AGD66 and ED50. - Use 3 different datums/location formats for location display and waypoint entry. - Supports a wide variety of angle, altitude, and distance formats. - Cell phone signal not required for basic navigation functionality. Online maps require a data connection. - Supports military date time groups for local/zulu time - Import and export waypoints via the standard GPX file format. Limited support for KML and CSV formats. Routes and tracks not supported. - Map ruler tool to measure distance/direction between two points on the map, snaps to waypoints NOT INCLUDED (YET) - Route planning - Track recording - Online mapping sources other than Apple and Google maps - Vector offline maps QUESTIONS [email protected] NOTES - WiFi-only iPads are not supported because they don't have a GPS receiver. - Mapping function requires a data connection. - Using GPS will shorten battery life. - Online maps are provided, hosted and updated by third parties. Maps may be inaccurate or censored. Map types and quality may change without notice. PRIVACY Because you can choose to use Google maps in the app, we are required to disclose the data collected by Google in our App Store listing. If you do not use Google maps minimal data is collected. See our privacy policy for details. WARNING YOUR USE OF MILGPS IS AT YOUR OWN RISK MilGPS is an aid to navigation only and is intended to be used in conjunction with other navigation methods and tools. MilGPS must not be used where relying on MilGPS could result in death, injury or financial loss. This includes use on military operations, live-firing activities, aviation and surveying use. MilGPS is not tested to military specifications and is not endorsed by the military of any nation. MilGPS is not a substitute for military issue equipment. Your use of MilGPS is governed by the standard App Store Licensed Application End User License Agreement.

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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

Offer more features in the free version to attract users.

Assumption to check: Limited offline functionality without a paid subscription.

Validate with people who use this workflow before building.

Hypothesis 2

Improve app stability and performance.

Assumption to check: Frequent crashes during navigation.

Validate with people who use this workflow before building.

Hypothesis 3

Implement better search algorithms and data sources.

Assumption to check: Inconsistent search results.

Validate with people who use this workflow before building.

Hypothesis 4

Allow users to customize map views and navigation preferences.

Assumption to check: Lack of user customization options.

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 Navigation
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Zustand
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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.