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.
You like using your old film camera but it doesn't have a built-in light meter?
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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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Generating… usually about a minute.
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 Luxilux Light Meter: map the core Photo & Video 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: Users report inaccuracies in light readings.
Validate with people who use this workflow before building.
Hypothesis 2
Assumption to check: Limited historical data management.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Confusing settings layout.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Price point is high for some users.
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.
You like using your old film camera but it doesn't have a built-in light meter? The built-in meter is broken or requires special batteries? With Luxilux you always have a light meter in your pocket. --- METERING --- Luxilux will take an average reading of the image you see in the preview. Specify the area for the meter reading even more accurately by zooming in or out. If your device has two or three back cameras, you can switch between them. You can also tap on points of interest to expose correctly for them. --- MODES --- Use Luxilux in aperture priority mode (Av) by choosing the ISO and aperture, and Luxilux will calculate the right shutter speed to get a proper exposure. Use it in shutter priority mode (Tv) by choosing the ISO and the shutter speed, and Luxilux will calculate the right aperture to get a proper exposure. Manual mode (M) lets you change all values and shows you how much they differ from the calculated optimal exposure. --- SAVE EXPOSURES --- Tap "Save" and the currently selected settings are saved alongside a preview image into your photo library. If you give location permission you can also save where the measurement was taken. You can view your saved photos in Luxilux or in the Photos app. --- PROFILES --- You can choose between full stops, half stops or third stops for ISO, aperture and shutter speed. Specify the minimum and maximum values that your combination of camera, lens and film supports. Save these settings in profiles so you can quickly recall them.
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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.