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.
WeatherFX is an app that is helpful to people who either work or play outdoors.
$0.99 · In-app purchases
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.
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
A product spec, phased build plan, differentiation notes, and screen references.
Illustrative example: an invoice app for independent contractors. Your kit is tailored to the app you choose; this is not its generated content.
Goal: Send a clear invoice after finishing a job.
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.
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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Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
Rork plan preview for WeatherFX: 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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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
Assumption to check: Inaccurate weather data
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited geographical coverage
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Cluttered UI
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Poor performance during heavy data loads
Validate with people who use this workflow before building.
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
WeatherFX is an app that is helpful to people who either work or play outdoors. Features: • Current International Weather Conditions • Up to 5 days of forecast data • Map with your location and closest weather station • Heat Flag Condition • Fluid Consumption and work Rest Ratios • Manual and Random Estimations • Spanish, French, Portuguese and Dutch Languages • Locale Support for time and measurements The app can provide guidance on work/rest ratios and fluid intake due to high temperatures. WeatherFX is an app that can retrieve temperature, barometric pressure and relative humidity based on the iPhone/iPad GPS data. The app will also approximate the wet bulb and wet bulb globe (WBGT) temperatures from the retrieved values. Please note that the WBGT is just an estimate. The estimate does not account for wind or low light conditions. The estimate is based on a moderate amount of sunlight. True WBGT can only be acquired through WBGT instrumentation. Once you accept the prompt to acquire the GPS position, the Latitude and Longitude labels will be populated. Click the “Update” button and the app will populate the temperature, pressure and humidity text fields based the closest weather Station ID to your position. The app will then calculate the wet bulb and WBGT temperatures. You'll also notice that the WeatherFX app will place the location name and time of the reading at the top of the screen. This way you will know if the readings are in your location and timely. Besides acquiring the weather from GPS you may get your own estimates for wet bulb and WBGT temperatures by typing temperature, pressure and humidity into the respective text fields. Click the “Manual” segmented button, enter the white fields followed by clicking the “Update” button. The app will also compute random numbers for temperature, pressure and humidity clicking the "Shake" segmented button. The device may be shaken and new settings will populate the fields. Click update button and the random wet bulb and WBGT temperatures will be computed. After an update has been executed, you may use WeatherFX to quickly convert temperatures from Fahrenheit to Celsius and vice versa by clicking the desired “°F” or "°C” segmented buttons. Barometric pressure may be converted from inches mercury to millibars and vice versa by clicking the desired “in” or “mBar” segmented buttons. After an update you will be presented with a flag condition button on the bottom left of the screen. The flag condition is derived from the WBGT estimate. If the flag condition is not “NONE”, you may click on the condition to yield work to rest ratios and water consumption given the current estimated flag condition. These figures are posted as a quick and portable reference only. Guidance for these figures are acquired from the U.S. Marine Corps Order 6200.1E dated June, 2002. You are strongly advised to read the complete guidance to know what each entry means.
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Plan a focused first version with your coding agent. These are planning assumptions, not a delivery guarantee.
Choose one audience and one core workflow. Use the kit to agree on its screens, data, and acceptance criteria before building.
Decide which secondary features, integrations, and platform support can wait. Your version does not need to reproduce everything in the original.
Validate external services, specialist technology, data access, and ongoing costs for your chosen scope.
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.