App Overview

Navionics® Boating icon

Navionics® Boating

Garmin · Navigation

Get up-to-date, detailed charts you can use offline plus a boatload of features on your mobile device, so they’re on hand wherever you go

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
2.9
2,346 ratings · Below Average

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 Navionics® Boating: 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 robust error handling and testing.

Assumption to check: Poor user ratings due to crashes and bugs

Validate with people who use this workflow before building.

Hypothesis 2

Enhance offline capabilities with more downloadable maps.

Assumption to check: Limited offline map access

Validate with people who use this workflow before building.

Hypothesis 3

Design a cleaner, more intuitive UI.

Assumption to check: User interface is cluttered and confusing

Validate with people who use this workflow before building.

Hypothesis 4

Offer more flexible pricing tiers and a free trial.

Assumption to check: High subscription costs for premium features

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

Get up-to-date, detailed charts you can use offline plus a boatload of features on your mobile device, so they’re on hand wherever you go. The Boating app is a must-have for cruising, fishing, sailing, diving and all your activities on the water. Try it free for a limited time. To continue using charts and advanced features, you can purchase a yearly auto-renewable subscription*. A COMPLETE PACKAGE • INTERNATIONALLY RENOWNED NAVIONICS® CHARTS: Use them offline along with multiple overlays, so you can be more aware of what’s above and below the water. - NAUTICAL CHART: Use this premier marine reference to study port plans, anchorages and safety depth contours, locate navaids, marine services and more. - SONARCHART™ HD BATHYMETRY MAPS: Extraordinary 1’ (0.5 meter) HD bottom contour detail is the ideal tool for locating new fishing areas. - U.S. GOVERNMENT CHARTS (NOAA): These are available within the following coverages: U.S. and Canada, Mexico, Caribbean to Brazil. - OVERLAYS: The relief shading overlay allows you to have a better understanding of bottom topography for improved fishing and diving. Sonar imagery reveals bottom hardness clearly and in vivid color on select lakes. Want more? Display satellite imagery on land and water. - MAP OPTIONS: Change chart-overlay combinations to customize chart views, activate night mode, highlight shallow areas, target multiple fishing ranges and more. - DAILY UPDATES: Benefit of thousands of daily updates worldwide. • TOOLS FOR PLANNING AND ENJOYING YOUR DAY - AUTO GUIDANCE+TM TECHNOLOGY**: Easily plan your trip with a suggested dock-to-dock path based on chart data and navigation aids. Get ETA, distance to arrival, heading to waypoint, fuel consumption and more. - WEATHER AND TIDES: Knowing conditions before heading out is crucial. Access real-time weather data, daily and hourly forecasts as well as wind, weather buoys, tides and currents. - MARKERS, TRACKS, DISTANCE: Place a marker on a good anchorage spot or where you reeled in a big fish. Record your track, take photos and videos within the app, and look back at your day anytime. Easily check distance among two points. • AN ACTIVE AND HELPFUL COMMUNITY - COMMUNITY EDITS and the ACTIVECAPTAIN® COMMUNITY: Obtain and contribute useful local knowledge along with thousands of fellow boaters, such as points of interest, navigation aids and valuable recommendations from people with firsthand experience of the local environment. - CONNECTIONS: Stay in touch with your friends and fellow boaters by sharing your live location, tracks, routes and markers to easily meet on the water or let them check out your adventures. - GPX IMPORT/EXPORT: Share your saved data outside the app or transfer it to your chartplotter. - SHARE MAP OBJECTS: Share a marina, repair shop or any other location outside the app. • EXTERNAL DEVICE-FRIENDLY FOR MORE FEATURES - PLOTTER SYNC: If you own a compatible chartplotter, sync it with the app to transfer routes and markers, activate, update or renew your Navionics chartplotter card subscription. - SONARCHART LIVE MAPPING FEATURE***: Connect with a compatible sonar/plotter, and create your own maps in real time while navigating. - AIS: Connect to a compatible AIS receiver with Wi-Fi® connectivity to see nearby marine traffic. Set a safe range, and receive visual and aural alerts to signal potential collisions. NOTES: *You can manage your subscription anytime, and you can turn auto-renewal off. **Auto Guidance+ is for planning purposes only and does not replace safe navigation operations ***Free features A tablet device with Wi-Fi connectivity locates your approximate position if it is connected to Wi-Fi. A tablet Wi-Fi + 3G model operates similarly to a phone device with GPS. Wi-Fi is a registered trademark of the Wi-Fi Alliance. iOS is a trademark licensed to Apple, Inc.

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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 Navigation
Expo Location
Axios
React Native Maps
Redux
Shadcn/UI
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.