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
Cosmetic Shades
Never buy the wrong shade again.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.3
3 ratings · Below Average
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 included18 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 Cosmetic Shades: 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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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
Expand shade database and allow user submissions.
Assumption to check: Limited shade options and colors available
Validate with people who use this workflow before building.
Hypothesis 2
Optimize app performance and stability.
Assumption to check: Inconsistent performance and crashes
Validate with people who use this workflow before building.
Hypothesis 3
Implement social features for shade sharing and reviews.
Assumption to check: Lack of user community features
Validate with people who use this workflow before building.
Hypothesis 4
Focus on improving UI and user experience.
Assumption to check: Poor user rating due to usability issues
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
Never buy the wrong shade again. How many times have you bought a foundation that looked perfect in store, got home, and it was completely wrong? Or ordered online and had to return it because the shade was nothing like you expected? Cosmetic Shades fixes that. Match yourself to the right shade across every major brand, before you spend a penny. Your shade in every brand. SKIN TONE ANALYSIS Use your camera to analyse your skin's undertone - warm, cool, olive or neutral. Get a personalised skin report so you always know which shades suit you best. BROWSE THOUSANDS OF SHADES Explore over 5,000 colour shades across 250+ products from luxury and drugstore brands. Search by brand, product name, or shade colour to find exactly what you're looking for. SHADE MATCHING Found a shade you love but want to try a different brand? Cosmetic Shades instantly finds the closest matching shades across hundreds of products, so you can switch brands without switching colours. VIRTUAL TRY-ON See how a shade looks on you before you buy. Take a selfie and preview shades directly on your face - compare side by side and pick with confidence. SMART MATCHING Get personalised shade recommendations based on your undertone analysis. Shades that suit your skin are highlighted so you can spot them at a glance. BUILD YOUR COLLECTION Save shades you own or want to try. Organise your collection, filter by colour, shop your favourite products, and never lose track of a shade you loved. SHARE WITH FRIENDS Found the perfect shade? Share it with friends and help them find their match too. Whether you're shopping in store or browsing from home, Cosmetic Shades saves you time and money by narrowing thousands of options down to the shades that actually match. Download now and never buy the wrong shade again. Terms of Service: https://www.cosmeticshades.com/terms_and_conditions.html Privacy Policy: https://www.cosmeticshades.com/privacy_policy.html
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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
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BUILD KIT DIFFICULTY
Advanced
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.
