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 Window
use your iphone, ipod touch or ipad as real weather station
$0.99 · In-app purchases
PRICE
$0.99
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 included15 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 Weather Window: 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 broader location search and user customization.
Assumption to check: Limited location options for weather data
Validate with people who use this workflow before building.
Hypothesis 2
Add push notifications for severe weather alerts.
Assumption to check: Lack of severe weather alerts
Validate with people who use this workflow before building.
Hypothesis 3
Enhance radar with more detailed overlays and options.
Assumption to check: Basic radar features only
Validate with people who use this workflow before building.
Hypothesis 4
Integrate air quality data into the main interface.
Assumption to check: No air quality index included
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
use your iphone, ipod touch or ipad as real weather station. big temperature display, windchill temperature, humidity, wind speed, wind direction, barometer, moonphases and more values can hardly be desired. the program finds the next weather station with your entered cityname. a 4-days weather forecast is built-in. new: 6 different cities adjustable and recallable displaying weather data: - shows actual weather data - manual location determination > weather-data nearby, world wide - shows the station name resp. the town - 16 backgrounds: clouds, sun, rain, mist, snow, frost etc? - temperature in °c or °f - windchill temperature - humidity in % - wind force (+ windcone/sock in 5 steps) - compass displaying the wind direction - air pressure (+ balloon & animated rotator) - actual moonphases displaying - date + time of the weather data - simulation of 16 weather sceneries, windsock, balloon (air pressure) - data: internet, online (only a few byte) settings: - temperature in °c or °f - barometer in mb or hpa or torr or psi or inchhg - wind speed in kph or mph or kn or meter per second - 6 cities storable more features: - button for updating data - animation (fade in of background, windsock, balloon, compass) - icon: badgenumber: last temperature - device do not turn off if run the app - 4 day preview with sun, moon and zodiac sign - weather podcast videos (video-streaming) - more precise weather - at snow: animated snowfall - deactivating the location service - view the drewpoint temperature - moonphases - ice forecast (for your car windshield) - barometer history (the last 6 values) - adapted for ipad - universal app (work on iphone, ipod and ipad)
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
Redux
Axios
React Navigation
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.
