App Overview

iNavX: Marine Navigation icon

iNavX: Marine Navigation

NavX Studios LLC · Navigation

Marine navigation is made easy with iNavX - the world's #1 handheld Chartplotter

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.8
21,702 ratings · Top 5%

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 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 iNavX: Marine Navigation: 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

Implement better GPS integration and error handling.

Assumption to check: Inaccurate GPS tracking in certain areas

Validate with people who use this workflow before building.

Hypothesis 2

Offer comprehensive offline map downloads.

Assumption to check: Limited offline map features

Validate with people who use this workflow before building.

Hypothesis 3

Simplify navigation and provide onboarding tutorials.

Assumption to check: Confusing UI for new users

Validate with people who use this workflow before building.

Hypothesis 4

Introduce more flexible pricing options and free features.

Assumption to check: High subscription costs compared to competitors

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

Marine navigation is made easy with iNavX - the world's #1 handheld Chartplotter. Access marine charts, maps, weather, AIS and more! iNavX is the only app to give you complete worldwide chart coverage, from all your favorite charts providers, including the ALL NEW iNavX Professional+ Chart series! Fully enabled with one-touch access, iNavX gives users access to the broadest set of marine charts and maps from multiple providers including: • iNavX Professional+ Charts • Blue Latitude • CHS • Explorer • Theyr Weather • Waterway Guide • … and more How does iNavX take handheld marine navigation to the next level? • Sailors - Plan sailing routes with waypoint and route management. Get proactive sail management with GRIB weather forecasts and then keep watch with AIS overlays and integration with your onboard systems. Plus, you can remember your great sailing locations by geotagging photos. • Boaters - Stay up to date on boating conditions with forecasts that include currents, winds, and swells. Manage your boating equipment with nautical instrument integration and then save great boating routes to share with the track log. • Anglers - Discover new fishing spots by scouting out holes and inlets. Locate the best fishing conditions by identifying cold fronts and save your best fishing spots with unlimited markers. Advanced features - iNavX is the most feature rich app available for all sailing and boating needs at a great price: Advanced Chart Plotter • Plot your position in real-time using your device's built-in GPS • Pan, zoom, and rotate charts (including course up) • Print detailed charts to use in combination with the app Advanced Navigation • Create waypoints and plan routes to navigate between them • Track log allows you to record your route • Import/export data in KML (Google Earth) or GPX format Advanced Instrumentation • Supports NMEA data over TCP/IP (using Wifi) • Integrates with external GPS, AIS receivers & transponders • Connect nautical instruments: Depth, Speed, Wind, Engine, Batteries, etc. Essential Toolkit • GRIB weather forecast • Tides/currents • Anchor alarm • AIS integration • Port/navaid search Download iNavX TODAY and automatically receive a complimentary copy of the official and up-to-date high-resolution NOAA RNC United States marine raster charts. REVIEWS “iNavX is the original and still one of the best navigation apps.” – Practical Sailor “The most full-featured navigation app around and viewed by many as the standard” – Sail Magazine "The #1 recommended marine charting app" - iMarineApps iNavX is Compatible with: Theyr Weather, Waterway Guide, AIS, Brookhouse, DigitalYacht, ShipModul, vYacht, Vesper Marine, NMEA 2000, Chetco and more. NEW CHART STORE Purchase all your favorite charts. Chart subscriptions vary by chart and provider from $9.99 to $199.99 annually, charged to your iTunes Account, which will automatically renew unless cancelled at least 24 hours before the end of the current period. Auto-renew can be turned off anytime by going to your Account Settings in iTunes after purchase. No cancellation of the current subscription is allowed during active subscription period. NOTE: Continued use of GPS running in the background can dramatically decrease battery life. MORE INFO Website: http://inavx.com/ User's Guide: http://inavx.com/help/ Terms of Use: http://inavx.com/terms Privacy Policy: http://inavx.com/privacy

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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
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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.