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
Weather Island
*Weather Island*
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.5
2 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/
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.
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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 Weather Island: 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
Use a reliable weather API for improved accuracy.
Assumption to check: Lack of accurate weather data
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize the app theme and layouts.
Assumption to check: Limited customization options
Validate with people who use this workflow before building.
Hypothesis 3
Focus on user experience design to improve usability.
Assumption to check: Poor user ratings indicate usability issues
Validate with people who use this workflow before building.
Hypothesis 4
Provide clearer messages regarding in-app purchases and their benefits.
Assumption to check: In-app purchases are not clearly communicated
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
*Weather Island* Use weather icons on Dynamic Island to check the current weather. Key Features: * Hourly and 10-Day Forecasts: Get reliable weather predictions at your convenience. Our app provides hourly updates and an extended 10-day forecast, ensuring you're always prepared, come rain or shine. * Precipitation: Know exactly when to expect rain or snow, so you can plan your day without weather disruptions. * Global Weather Search: Is there any global place you want to know its weather? Effortlessly search for weather updates in different locations around the globe. * Customizable Icons for Your Current Weather: Personalize your experience with our unique selection of weather icons. Choose your favorite to represent the current weather in your location. * Dynamic Island and Lock Screen Widgets: Bring life to your iPhone's Dynamic Island and lock screen with weather information. Our app allows you to display a chosen weather icon along with the current temperature, right where you can see it at a glance. A real-time weather update is coming soon. Currently, dynamic island and lock screen widgets only show the weather information and icon of the moment when it is set. Download Weather Island Today and decorate your iPhone!
Written user reviews are not shown here. Check current App Store reviews >
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-native-maps
@react-navigation/native
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.
