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
ColorCard: Palette Tool
Promoted by App Store for 10+ times.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
41 ratings · Top 5%
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.
Build your own version
Build Kit
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
First kit free with a verified email
Add to a Remix
Combine features and design from your favorite apps.
Kit ready. Verify your email to download it.
Generating… usually about a minute.
Make it yours Optional
What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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.
JavaScript is required to complete mailbox verification.
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 ColorCard: Palette Tool: map the core Reference workflow, choose the smallest differentiated feature set, define the data and monetization boundaries, then prototype the riskiest user journey first.
Preview ready. Verify your email to reveal and copy the full prompt.
JavaScript is required to complete mailbox verification. Return to this prompt preview.
Continue in Rork >
Affiliate link: CloneChart may earn a commission at no extra cost
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
Incorporate a wider range of colors and tools for advanced users.
Assumption to check: Limited color options compared to professional tools.
Validate with people who use this workflow before building.
Hypothesis 2
Add features that allow users to share palettes with others.
Assumption to check: No community sharing options.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance UI with modern design principles and animations for engagement.
Assumption to check: Basic user interface can feel outdated.
Validate with people who use this workflow before building.
Hypothesis 4
Implement folders or tags for better palette organization.
Assumption to check: Lack of organization for saved palettes.
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
Promoted by App Store for 10+ times. "Color Card" is an application that revolves around "Color". Designers get inspiration and manage their own color schemes here. The "Color Card" also provides professional color matching libraries and design tools. In addition, the "Color Card" ushered in a new way of playing. After the photos are specially processed, they can emit a unique and dazzling brilliance. Let's briefly talk about what can the "Color Card" do? Of course, more practical functions and unique photo gameplay need to be studied together. "Color Card" - Update the super high-value color scheme from time to time to provide inspiration. - You can create to make your color scheme more orderly. - Generate 3 beautiful color cards to make photos highlight color matching. "How to Play" - "Color Enhance" gameplay, highlight the color scheme or main color on the photo. - "Dyeing" gameplay, make photos into monochrome, more sensation. - "Crazy" gameplay, a crazy, unusually special photo effect. "Color Library" - Provide 400+ classic color schemes, each of which has been tested. - Provide 300+ gradient color schemes, no longer clueless at the beginning of creation. - Professional color value converter, full-category color value conversion, complementary color and other professional opinions. "Color Card" is applicable to iPhone and iPad devices, and it will synchronize your data between devices intelligently. It is worth noting that we are still exploring and we hope to solve more problems together and look forward to your feedback.
Written user reviews are not shown here. Check current App Store reviews >
Screenshots
< Scroll to see more >
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 Navigation
Supabase
React Native Color Picker
Expo
Zustand
BUILD KIT DIFFICULTY
Starter
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.
