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.
This app provides, using weather conditions and your engine configuration, a recommendation about jetting and spark plug to use for karts with Rotax Max EVO (Senior, Minimax, Micromax, Supermax, DD2 or Junior), which ...
$5.99 · 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.
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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 Jetting for Rotax Max EVO Kart: map the core Sports 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: Limited user engagement features.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Lack of personalized recommendations.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: No social sharing options.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Static content without updates.
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.
This app provides, using weather conditions and your engine configuration, a recommendation about jetting and spark plug to use for karts with Rotax Max EVO (Senior, Minimax, Micromax, Supermax, DD2 or Junior), which use a Dellorto VHSB 34 XS carb. In order to get the weather values, the application can use the GPS to obtain the position and altitude, and the network connection to get the temperature, pressure and humidity from the nearest weather station. Nevertheless, the application can run without GPS and internet connection, in this case, the user has to give the weather data. The application is made up of four tabs that are described next: - Results: in this tab, the recommended main jet, needle position, air density and spark plug type values are shown. This data are calculated depending on the weather conditions and the engine configuration given in the next tabs. In addition, this tab lets to make a fine tuning adjustment to adapt to a concrete engine. - Weather: you can set the values for current temperature, altitude, pressure and humidity. The values of this screen can be manually set or can be loaded by the application reading the data from the nearest public weather station (from the GPS tab). - Engine: you can set in this screen the information about your engine, carburator and track, that is, the engine type (Micromax, Minimax, Senior, Supermax, Junior or DD2), the model year of the engine, the spark plug brand used, the needle type, the float/pilot jet combo, the floats height, venturi, oil mix ratio, airbox type (new or old model) and the track type. - GPS: this tab allows to use the GPS to get the current position and altitude, and connect to an external service to get the weather conditions of the nearest weather station (temperature, pressure and humidity). The application works with different measure units: inHg, mb, mmHg, hPa, atm for pressure, ºC and ºF for temperature. The app is NOT VALID for Rotax Max engines before 2015. For these engines, you should install Jetting Max Kart.
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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.