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
WeatherMarine — Forecast App
WeatherMarine features marine weather conditions, forecasts and tides from trusted data providers worldwide
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.9
7 ratings · Top 50%
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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included19 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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.
JavaScript is required to complete mailbox verification.
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 WeatherMarine — Forecast App: map the core Weather workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Offer unique features like personalized marine alerts or detailed fishing forecasts.
Assumption to check: Limited features compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Utilize multiple data sources for more reliable forecasts.
Assumption to check: Inconsistent data accuracy
Validate with people who use this workflow before building.
Hypothesis 3
Implement a more streamlined design for better user experience.
Assumption to check: Cluttered UI
Validate with people who use this workflow before building.
Hypothesis 4
Optimize data fetching and caching strategies to improve performance.
Assumption to check: Slow load times
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
WeatherMarine features marine weather conditions, forecasts and tides from trusted data providers worldwide. It's simple, powerful, and provides easy access to 5-day marine forecasts anywhere around the world. Features: • Forecasts Marine forecast charts visualizing wind speed, gusts, wave height, tides and solunar data. • Home/Lock Screen Widgets Add beautiful and powerful widgets to your Home Screen or Lock Screen. WeatherMarine features an extensive set of widgets, with powerful customization options allow for endless combinations of marine and tide conditions. • Radar Precipitation radar featuring past hour and next hour data. • Live Activities Use Live Activities to track wind speed/direction, wave height or tides from the Dynamic Island and Lock Screen. • Summary Shortcuts Use Siri or the Shortcuts app to view different summaries of the wind, wave and tide conditions, upcoming forecasts, and more. Ask Siri "Show Tides on WeatherMarine” to never miss the right conditions. • NOAA Forecasts 5-day text forecasts with real-time conditions—accessible via tap on our custom designed map. • Pro Features Many features in the app are free to use. Widgets, live activities, enhanced radar, future chart data and unlimited locations require an active Pro subscription. Download of WeatherMarine App is free of charge. Upgrade to Pro version is available on a yearly or monthly subscription basis (price may vary between locations). Should you choose to upgrade to Pro version, payment will be charged to iTunes Account at confirmation of purchase. Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of current period. Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings in iTunes after purchase. Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable. The subscription will renew at the same cost. Terms of use & privacy policy: https://weathermarine.app/terms https://weathermarine.app/privacy
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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
Axios
Zustand
react-native-maps
@react-navigation/native
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.
