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
Photo Color Painter
Photo Color Painter provides two color painting modes for photos: Original Color Painting and Custom Color Painting.
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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 Photo Color Painter: 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
Introduce advanced editing features like filters and effects.
Assumption to check: Limited editing options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Add social sharing and community galleries.
Assumption to check: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 3
Implement an interactive onboarding experience.
Assumption to check: No clear tutorial or onboarding process
Validate with people who use this workflow before building.
Hypothesis 4
Optimize image handling and editing processes.
Assumption to check: Poor performance with large images
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
Photo Color Painter provides two color painting modes for photos: Original Color Painting and Custom Color Painting. Original Color Painting turns an original color photo into black and white, allowing you to paint and revive the original color. Custom Color Painting turns an original color photo into black and white, letting you repaint it with your desired colors. Original Color Painting: • Paint your photo into an artistic black and white image while highlighting specific color objects. • Photos become more attractive with grayscale surroundings and highlighted color. Custom Color Painting: • Add realistic colors to black-and-white photos. • Simply select a color from the color panel and paint it onto the black-and-white photo. • Designed for painting old black-and-white photos into color. • A creative tool to recolor your photos. • Great for recoloring old photos. The intuitive and responsive multi-touch user interface makes Photo Color Painter incredibly easy and fun to use. Use your finger as a brush to "paint" sections of your image with color. Zooming in and out using the two-finger pinch gesture allows for pixel-accurate detail work. Features: • User-friendly interface. • Import your picture from the gallery or take a photo with the camera. • Automatically convert your photo into black and white. • Set image size to small, medium, or large. • Use two fingers to zoom or pan for detailed painting. • Hard and soft circular brush options. [Original Color Painting] • Paint or erase mode. [Custom Color Painting] • Adjustable brush size. • Undo/Redo for any mistakes made. • Preview the color image while painting. • Save the final image to your photo library or share it on social media. Thank you for your support! Visit nitrio.com for more apps for your iOS devices.
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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
React Native
Expo
Supabase
react-navigation
@supabase/supabase-js
expo-image-picker
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.
