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
Color Splash
Color Splash lets you give photos a dramatic look by converting them to black and white, while keeping your chosen details in color
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
6,470 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.
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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 Color Splash: 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
Add more advanced editing features like layer support and AI tools.
Assumption to check: Limited editing tools compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Create a clearer paywall and subscription explanation.
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize image processing and provide lower resolution options.
Assumption to check: Slow performance with high-resolution images.
Validate with people who use this workflow before building.
Hypothesis 4
Implement an onboarding tutorial and support resources.
Assumption to check: Lack of user support and tutorials.
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
Color Splash lets you give photos a dramatic look by converting them to black and white, while keeping your chosen details in color. This effect draws the viewers' attention to the colored areas, creating striking images. The intuitive and responsive multi-touch user interface makes Color Splash amazingly easy and fun to use. Use your finger as a brush to "paint" sections of your image black and white, or to bring back the original color. Zooming in and out using the two-finger pinching gesture allows you to work on details with pixel-accuracy. Features: - Short tutorial videos explain the use of all features and will have you editing your images in minutes. - Choose photos to edit from your iPhone photo library or from Dropbox or Flickr. - Save multiple sessions to resume your work later. - Email your creations to friends, share them on Flickr or save them to your Dropbox. - Undo any number of accidental brush strokes. - An alternative view mode highlights the regions that will remain in color with a red tint. This makes it easier to see and adjust the boundaries between color and black & white regions. - Choose from 4 different brushes (hard or soft edged, opaque or transparent) and adjust the brush size. - Hide the toolbars in full screen mode.
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
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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.
