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
Paint By Number Creator
Your favorite photo deserves more than a gallery scroll
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
168 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
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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 Paint By Number Creator: 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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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
Allow users to create custom color palettes and upload their own images.
Assumption to check: Limited customization options for images and colors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement clearer user feedback regarding premium features.
Assumption to check: In-app purchases may be unclear or too frequent.
Validate with people who use this workflow before building.
Hypothesis 3
Introduce advanced filtering and sorting options in the gallery.
Assumption to check: Difficulty in managing large galleries of artworks.
Validate with people who use this workflow before building.
Hypothesis 4
Enable sharing completed artworks directly to social media platforms.
Assumption to check: Lack of social sharing features.
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
Your favorite photo deserves more than a gallery scroll. Paint By Number Creator transforms it into a classic numbered painting you can enjoy yourself, share with family, or print as a handmade gift. Open a picture, choose how detailed you want the palette, and watch regions and numbers appear. Prefer speed? Use Rough. Want finer shapes? Switch to Precise. Then paint digitally—fill everything at once or one area at a time—or export a crisp PDF with a color key for real paints and paper. Why people love it • Bring memories, pets, and portraits to life as numbered art • Dial in 2–64 colors and A4, A3, or A2 paper for the look you want • Rough for a quick result, Precise when every contour counts • Flip between original, filled colors, and numbered outlines • Playful fill modes: complete the whole picture or tap area by area • Match paints with RAL, RGB, HEX, or Pantone FHI labels • Export PDF with color key, print, or save JPEG views • Keep projects in your library and pick up anytime From rainy-day coloring to classroom crafts and thoughtful keepsakes, Paint By Number Creator makes creating feel easy—and finishing feel wonderful.
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
react-navigation
axios
@react-native-community/slider
expo-image-picker
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.
