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
National Hurricane Center Data
Download the most comprehensive Hurricane Tracker app for iOS.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
76,112 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.
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 National Hurricane Center Data: 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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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
Download the most comprehensive Hurricane Tracker app for iOS. MAIN FEATURES INCLUDE: + GOES Satellite Imagery Animations + National Hurricane Center Products + National Weather Service Alerts + Weather Prediction Center Graphics + Tropical Weather Push Notifications + Satellite Imagery Home Screen Widget + Spaghetti Models GRAPHICAL PRODUCTS INCLUDE: Forecast Graphics - Spaghetti Models - 7-Day Tropical Weather Outlook - 3-Day Excessive Rainfall Outlook - 7-Day Quantitative Precipitation Forecast Storm Specific Graphics - Key Messages - Cone Track Forecast - Tropical Storm Wind (Most Likely) - Tropical Storm Wind (Earliest) - Hurricane Wind Probability - Surface Wind Field - Surface Wind Analysis - Wind / Track History - Rainfall Forecast - Flash Flood Risk Local Storm Threat Graphics - Flooding Rain Threat - Wind Threat - Surge Threat - Tornado Threat - Rainfall Totals - Wind Warnings Note: Local threat graphics are typically not available until shortly before storm landfall. TEXT PRODUCTS INCLUDE: - Tropical Weather Outlook - Forecast Advisories - Public Advisories - Forecast Office Discussion - Local Statement (HLS) - Local Warnings (TCV) - Tropical Discussion - Wind Analysis WEATHER MAP OVERLAYS INCLUDE: - Hurricane Track & Intensity - Potential Storm Surge Flooding - NASA Sea Surface Temperature - NOAA Weather Radar GOES SATELLITE IMAGERY INCLUDES: 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 APPLE WATCH APP INCLUDES: - View wind speed & intensity updates every 30 minutes - View the latest satellite imagery - Choose from a variety of Watch Complications -- PRO SUBSCRIPTION FEATURES -- Full Screen, High Resolution Satellite Imagery: - Latest Image - Animated Loop - Mesoscale: Near Real-time Imagery - Geostationary Lightning Mapper (GLM) Mesoscale imagery typically has 1-minute temporal resolution, but is not always available for each storm. 16-day Weather Forecast Models: - Global Forecast System (GFS) - AI Global Forecast System (AIGFS) - Global Ensemble Forecast System (GEFS) - North American Ensemble (NAEFS) Weather Simulation Forecast Models: - 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) - WaveWatch III (WW3) - European Centre for Medium-Range Weather (ECMWF) - ECMWF AI Forecast System (AIFS) Hurricane Models (HAFS, HMON, HWRF, CTCX) Experimental Forecast Animations: - Simulated Radar 2km - Surface Pressure, Wind - 200mb Temp, Ht, Wind - 700mb RH, Ht, Wind - 850mb Vort, Wind, Thick Model Analysis & Guidance Animations: - 6h Total Precipitation - 10m Wind - 200mb Vort, Wind, Ht - 500mb Relative Humidity - 700mb Vort, Wind, Ht - 850mb Vort, Wind, Ht NCEP / ECMWF Cyclogenesis Tracking Products - 10-day ECMWF Cyclogenesis - 12-day ECMWF Strike Probability - 28-day ECMWF Tropical Cyclone Activity - 10-day Probability of Formation - 16-day Storm Forecast Tracks - 21-day Global Tropics Hazards Outlook - 35-day Long Range Probability - 15-day Deepmind FNV3 Cyclogenesis CIMSS Tropical Cyclone Products - Wind Vorticity & Shear Analysis - Steering Layer Analysis - Morphed Integrated Microwave Imagery - Advanced Dvorak Technique (ADTV9.1) ADT Includes imagery, wind radii estimates & trends Interactive Hurricane Tracker Map - Track & Intensity Forecast - Preliminary Best Track Analysis TERMS & CONDITIONS https://lwbrandsllc.com/hurricane-app-terms-conditions/ -- In total, there are now over 100+ hurricane / weather tracking products to help you stay informed during hurricane season.
Written user reviews are not shown here. Check current App Store reviews >
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 a more user-friendly interface with guided navigation.
Assumption to check: Users often find the app's data overwhelming and hard to navigate.
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize alert types and frequency.
Assumption to check: Notifications can be too frequent and not customizable.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance map features with zoom and detailed storm tracking.
Assumption to check: Limited map interaction features.
Validate with people who use this workflow before building.
Hypothesis 4
Integrate a community section for users to share updates and advice.
Assumption to check: Lack of community features for sharing experiences.
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
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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.
