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.
App Overview
Marine Weather Forecast Pro
Download the most comprehensive NOAA Marine Weather app for iOS.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
16,322 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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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.
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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Free quick prompt For a smaller starting point
Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Marine Weather Forecast Pro: 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
Allow users to set custom alerts based on specific conditions.
Assumption to check: Limited customization for notifications
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the layout with better organization of information.
Assumption to check: User interface can be cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Improve navigation to detailed weather data.
Assumption to check: Difficulty in accessing detailed forecasts
Validate with people who use this workflow before building.
Hypothesis 4
Implement a more reliable data-fetching mechanism to ensure timely updates.
Assumption to check: Inconsistent data updating
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
Download the most comprehensive NOAA Marine Weather app for iOS. MAIN FEATURES INCLUDE: + Real-time Marine Weather Buoy Data + 5-day NWS Marine Weather Forecast + 6-hour Historical Wave Trend Reports + 7-day Hourly WaveWatch III Model + 7-day Hourly Harmonic Tide Forecast + NOAA Marine Weather Map Overlays + Offshore Marine Zone Forecast + Detailed NWS Forecast Discussion + Apple Watch App REAL-TIME DATA - Primary & Secondary Swell Height - Swell Period & Direction - Spectral Wave Energy Density - Significant Wave Height - Wind Speed, Gust & Direction - Air Temperature - Water Temperature - Pressure - Current NWS Alerts 6-HOUR HISTORY DATA - Primary & Secondary Wave Height - Swell Period & Direction - Wave Energy, Period, Direction 7-DAY NOAA WaveWatch III MODEL - Hourly Swell Predictions (1-6 swells) - Accurate Wave Height, Period & Direction 7-DAY HOURLY HARMONIC TIDE FORECAST - Interactive Tide Graphs - Hourly Tide Predictions - Current Tide 5-DAY NWS MARINE FORECAST - Text Summary Forecast - Marine Weather, Sky, Wind, Waves - Includes Offshore Marine Zones - Tap any point on the map! NOAA CHARTS (MAP OVERLAYS) - Radar Base Reflectivity - ENC Nautical Charts - NASA GOES Band 13 APPLE WATCH APP - View the latest buoy data with a simple glance - Includes Watch Complications * Available for iPad & iPhone -- PRO SUBSCRIPTION FEATURES -- + Hourly Wave, Wind & Weather Forecast + NWS Severe Weather Push Notifications + NCEP Weather Forecast Models + Access 20,000 Weather Stations + High Resolution Satellite Imagery + NASA SST & Chlorophyll Map Overlays HOURLY WEATHER FORECAST - Signifiant Wave Height - Wind Waves - Swell (Primary / Secondary Swell if Available) - Wind Speed, Gust, Direction - Air Temperature - Probability of Precipitation - Cloud Cover - Relative Humidity SEVERE WEATHER PUSH NOTIFICATIONS - Customize NWS Alerts by Marine Zone - Detailed Alert Information 16-DAY WEATHER FORECAST MODELS - Global Forecast System (GFS) - Global Ensemble Forecast System (GEFS) - North American Ensemble (NAEFS) WEATHER SIMULATION FORECAST MODELS - WaveWatch III (WW3) - Nearshore Wave Prediction System (NWPS) - Great Lakes Coastal Forecast System (GLCFS) - Hi-Res Rapid Refresh (HRRR) - Hi-Res Ensemble Forecast (HREF) - North American Mesoscale (NAM) - Hi-Res North American Mesoscale (NAM-HIRES) - High Resolution Window (HRW-FV3, HRW-ARW, HRW-ARW2) ACCESS OVER 20,000+ WEATHER STATIONS - Wind Speed, Direction, Gust - Dew Point, Humidity, Temperature, Pressure - Wind History Graphs HIGH RESOLUTION SATELLITE IMAGERY Fifteen (15) Satellite Imagery Filters - Visible (Band 2) - Near IR (Bands 4 & 5) - Infrared (Bands 7, 8, 9, 10, 13, 14 & 16) - Nighttime Microphysics - Day Cloud Phase - True Color - Air Mass - Sandwich NASA MAP OVERLAYS - Sea Surface Temperature - Chlorophyll TERMS & CONDITIONS https://lwbrandsllc.com/marine-weather-forecast-pro-terms-conditions/ -- IMPORTANT! Please remember that this app can only show data the buoy collects. Not all buoys collect weather data. Not all buoys collect wave data. This app will display all data collected by a buoy. This app is primarily designed to focus on buoys that display the most complete package of marine weather data (waves, weather, forecast, tide etc). If you notice a missing a buoy, please contact me first rather than leaving a poor review. If you are correct, the buoy can be easily be added to the cloud database. Lastly, please feel free to contact me with questions, feedback, feature requests and bug reports at [email protected] Enjoy.
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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
Expo
Supabase
Axios
React Navigation
Lodash
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.
