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
Chad Evans Weather
The Chad Evans Weather App is the most powerful, data-driven weather app for the Greater Lafayette, Indiana area and beyond
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 5.0
7 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 included19 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 Chad Evans Weather: 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
Focus on a clean, minimalist design that presents essential weather data clearly.
Assumption to check: Users often find weather apps to be overloaded with information.
Validate with people who use this workflow before building.
Hypothesis 2
Utilize reliable weather APIs and provide disclaimers on forecast reliability.
Assumption to check: Inaccurate weather predictions can frustrate users.
Validate with people who use this workflow before building.
Hypothesis 3
Implement user-friendly settings for notifications that users can customize.
Assumption to check: Push notifications can be intrusive.
Validate with people who use this workflow before building.
Hypothesis 4
Ensure the app supports a wide range of locations and offers a way to request new locations.
Assumption to check: Limited geographic coverage.
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
The Chad Evans Weather App is the most powerful, data-driven weather app for the Greater Lafayette, Indiana area and beyond. A live interactive radar with customizable alerts will help you plan around the ever-changing Midwest weather. This app doesn't just tell you when a storm warning is issued. One of Chad's favorite features is how this app provides you alerts about dangerous storms that are approaching your home and current location, even before the warning is issued! Hail, rain, wind, snow... you name it. You will find out about it first with this app. You'll also get the Baron Tornado Index, ranking the likelihood of a tornado within an approaching storm cell. The app also provides a direct link to Chad's Weather Blog and Chad's Video Forecasts on YouTube. You can also submit your weather pics here. This is a local weather app that you can control and customize to fit your needs to stay ahead of impactful weather, and link to Chad's comprehensive weather coverage.
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
Zustand
axios
react-navigation
react-native-maps
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.
