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
Just METAR
Accurate METAR weather
$3.99
PRICE
$3.99
No in-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
1 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 included
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 Just METAR: 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
Implement customizable themes and layouts for users.
Assumption to check: Limited customization for weather data display.
Validate with people who use this workflow before building.
Hypothesis 2
Add caching for previously fetched METAR data.
Assumption to check: No offline access to saved data.
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate push notifications for severe weather conditions.
Assumption to check: Absence of severe weather alerts.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to save favorite locations and set default views.
Assumption to check: No user personalization settings.
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
Accurate METAR weather. Instantly. Check METAR and TAF data in seconds - on your iPhone, Apple Watch, and widgets. No subscriptions. No clutter. Just the information you need. One-time purchase. No subscriptions. Most apps lock key features like widgets or Watch support behind subscriptions. This app doesn’t. Pay once and get full access - forever. Apple Watch & Widgets Stay updated at a glance. View METAR directly on your wrist or from your home and lock screen. Automatic nearest station Instantly see the closest reporting station based on your location. Global coverage Search any ICAO station worldwide in seconds. Clear METAR & TAF display Raw data, cleanly formatted and easy to read. Explanations If you ever encounter an unknown abbreviation Just METAR has you covered. It features detailed explanations for most standard and non-standard tokens. Fast and lightweight No unnecessary features. No distractions. Just METAR. Reliable data source Weather data is provided by the Aviation Weather Center (NOAA). This app is not affiliated with or endorsed by NOAA. Privacy first No account. No tracking. No data collection. Location is used only to determine the nearest station and is never stored.
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 Paper
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
