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.
Plan, calculate, and paint smarter.
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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 Paint Advisor: Calculator: map the core Lifestyle 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: No visual aids for calculations.
Validate with people who use this workflow before building.
Hypothesis 3
Assumption to check: Minimal personalization options.
Validate with people who use this workflow before building.
Hypothesis 4
Assumption to check: Lack of user feedback mechanisms.
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.
Plan, calculate, and paint smarter. Paint Advisor helps you find exactly how much paint you need for any room - no guesswork or math stress. Enter your room dimensions, number of doors and windows, and the coverage per liter or gallon to instantly see how much paint to buy. Whether you’re painting one wall or an entire house, Paint Advisor delivers accurate results based on your real room setup. Adjust for multiple coats, include or exclude ceilings, and choose between metric or imperial units. The app also provides helpful preparation and finishing tips to achieve a professional result. Key features: • Accurate results – Calculates total wall and ceiling area minus doors and windows. • Coat and coverage settings – Adjust for any paint type or brand label. • Metric & Imperial units – Switch easily between meters, feet, liters, and gallons. • Preparation and finish guidance – Includes checklists and practical reminders. • Packaging suggestions – Shows how many 5L or 1L buckets to buy. • Project history – Save and compare your previous calculations anytime. Paint Advisor is perfect for homeowners, decorators, and DIY painters who want clear numbers and a reliable plan before starting a project. You’ll get all the essentials in one clean view - area, coats, and total liters needed. The app uses industry-standard coverage values (typically 8–12 m² per liter or 300–450 ft² per gallon) and avoids overcomplication. Adjust inputs anytime to instantly recalculate without losing your data. Paint Advisor helps you save money, avoid leftovers, and keep your renovation on track - from prep to the final coat.
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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.