App Overview

Weather4D Routing & Navigation icon

Weather4D Routing & Navigation

APP4NAV · Weather

Weather4D Routing & Navigation integrates weather forecasting, routing calculations, navigation with digitized raster charts, instruments and data sharing to maximize your boating experience.

$59.99 · In-app purchases

PRICE
$59.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
4.9
8 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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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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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 Weather4D Routing & Navigation: map the core Weather 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 offline caching of weather data and routes

Assumption to check: Limited offline capabilities, causing issues in remote areas

Validate with people who use this workflow before building.

Hypothesis 2

Offer more flexible pricing tiers or a free trial period

Assumption to check: High subscription price may deter users

Validate with people who use this workflow before building.

Hypothesis 3

Create in-app guides or tutorials to enhance user understanding

Assumption to check: Lack of detailed user tutorials for navigation

Validate with people who use this workflow before building.

Hypothesis 4

Simplify the onboarding process and provide clear navigation cues

Assumption to check: Complex interface for new users

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

Weather4D Routing & Navigation integrates weather forecasting, routing calculations, navigation with digitized raster charts, instruments and data sharing to maximize your boating experience. Navigation See SOG, COG, VMC, HDG, TWS, AWS, ETAs, ETWs, AIS data and more in real time along with weather and routing information with a wifi connection to a transponder. Store your charts on your device for offshore/offline navigations. Set the screen to night mode after sunset to better see what’s happening outside during your watch. Set alarms to alert about excessive XTE, course deviations, surrounding boats, excessive wind speed and low depth. Take advantage of the iPad/iPhone built in compass, pressure and acceleration sensors. Connect bluetooth devices like wireless anemometers and wind vanes. Share AIS and boat sensors data like wind, current, pressure, air and sea temperature within the Weather4D users community. Activate Man Overboard safety feature to estimate drift and thus rescue location based on current and wind. Weather View combined weather data displayed in 3D HD layers animated automatically or manually by sliding a finger on the screen. Use GFS model to get started. In addition, over 35 weather and oceanographic models are available with a yearly subscription (in-app purchase). Create your own geographical zones, select the models you need and download only the characteristics that matter to you: data type, resolution, periodicity, file size, etc. GRIB files can be downloaded anywhere through a regular or satellite internet connection. Split the screen (iPad only) to combine and/or compare: navigation and weather, weather and waves or currents, two weather models… Routing Routing calculation optimizes for safety, comfort and performance when sailing, motoring, or mixing the two. Create a route and calculate its associated routings in function of departure dates/times, forecasts (weather, wave and current), minimum sailing speed, motoring speed, boat polar, maximum wind and minimum distance to the coast. Visualize sail configurations based on your routings and your own set of sails. Save waypoints, locations, simulate routes, combine them with GRIB forecast models. Restart a routing calculation at anytime from the actual boat position. Default Models and Charts ———————————— GFS global forecast model at 0.25 °, 0.5 °, 1 ° and 2 ° resolutions BING global chart OSM (Opens Street Map) global chart Optional Models (GRIBs) and Nautical Charts (additional fees apply) ——————————————————————————————- ECMWF IFS & AIFS NAM USA   HRR CONUS GDPS ICON-EU Europe ICON D2 UKV ARPEGE Global, Europe AROME France, Antilles, Guyane, Polynésie, Calédonie, Indien AROME HD France Waves: GFS Wave MFWAM Global, Europe, France IFREMER Currents: Copernicus Global SMOC, IBI, NWS, Baltic, Med NCOM AMSEAS, USEAST, ALASKA, SOCAL, HAWAII HYCOM IFREMER MSC Saint Laurent Nautical Charts: GeoGarage is Weather4D supplier and offers by subscription access to more than 10,000 nautical charts derived from International Hydrographic Services. Pricing and chart selection is set per publisher. Updates are released regularly under chart publishers authority. Once the subscription is purchased, charts are instantly accessible within the application. Available publishers: NOAA RNCs (USA) CHS (Canada) WAVEYLINE (Bahamas) DHNV (Venezuela) DHN (Brazil) SHN (Argentina) LINZ (New Zealand) SHOM (France / DOM-TOM / Polynesia + international) UKHO (UK and dependencies + international) BSH (Germany) NLHO (Netherlands) VLAAMSE (Belgium) DGA (Denmark) NHS (Norway) ICG-HD (Iceland) NAVIMAP / IIM (Italy) ENC_ES (Spain) ENC_HR (Croatia) ENC_PL (Poland) ENC_PT (Portugal) ENC_AU (Australia) BLP (West Mexico) IMRAY (North Sea, English Channel, West Britain & Ireland, Atlantic France, Iberia & Atlantic Islands, Western Mediterranean, Central Mediterranean, East Mediterranean, Netherlands) GeoCuba (Cuba)

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Screenshots

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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.

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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.