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
Litur - Color Library
A color picker for the real world
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
24 ratings · Top 15%
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 included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Litur - Color Library: map the core Graphics & Design 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
Add more color palettes and customization features.
Assumption to check: Limited color customization options
Validate with people who use this workflow before building.
Hypothesis 2
Introduce sharing and collaboration on palettes.
Assumption to check: No collaboration features
Validate with people who use this workflow before building.
Hypothesis 3
Provide onboarding tutorials and tips.
Assumption to check: Lack of tutorials for new users
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the paywall and clarify premium feature benefits.
Assumption to check: In-app purchases can be confusing
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
A color picker for the real world. Litur helps you find and collect all the colors around you. -- COLOR INTELLIGENCE -- Color intelligence is here. Ask Litur for color suggestions, palettes or practical color tips. Just about anything related to color! -- REAL-TIME PREVIEW -- As soon as you launch Litur, you start seeing the beautiful colors around you -- COLOR FROM IMAGES -- You can pick colors from any image in your photo library. -- COLOR COMBINATIONS -- You can see different color combinations for each color you collect; Complementary, Analogous, Monochromatic, Triadic, and Tetradic. -- CONTRAST CHECKER -- Check the color contrast between two colors -- EDIT COLORS Taken a color but you want to adjust it just right? Easily do that -- COLOR CODES -- Litur allows you to get the color codes in HEX, RGB, HSB & CMYK for use in your projects. You can copy with a tap and use it anywhere -- GENERATED COLOR PALETTES -- For each color you collect, Litur creates and generates a palette that goes well with that color -- CUSTOM COLOR PALETTES -- You can create palettes from the colors you collect and assign a name to each palette -- SHARE PALETTES -- You can share both generated palettes and custom palettes in a beautiful image format. -- WATCH APP -- Get a list of your latest colors in the companion watch app. -- SYNC -- Litur syncs your colors across all devices that you have the app installed. So never lose any of your colors More info at https://litur.app *Color Intelligence requires Apple Intelligence compatible devices as well as Apple Intelligence turned on.
Written user reviews are not shown here. Check current App Store reviews >
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
React Native
Expo
Supabase
Zustand
react-native-color-picker
react-navigation
BUILD KIT DIFFICULTY
Intermediate
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.
