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
Colorburn
***App Store Best of 2015***
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.5
380 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 included18 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 Colorburn: 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
Offer more diverse filters and customization options.
Assumption to check: Limited filter options compared to competitors.
Validate with people who use this workflow before building.
Hypothesis 2
Implement more robust error handling and optimization.
Assumption to check: Occasional crashes during photo processing.
Validate with people who use this workflow before building.
Hypothesis 3
Provide an option to remove watermark through a more accessible one-time purchase.
Assumption to check: Watermark on free version is off-putting for users.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce cloud storage for user edits to prevent data loss.
Assumption to check: Lack of cloud backup for edits.
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
***App Store Best of 2015*** Colorburn is a camera app with 1000 filters, the most amount filters in App Store, created especially for those who love to stand out. A photo-filter app with a unique twist, Colorburn makes it easy and fun to turn your favorite moments into cool-looking memories. Its ingenious interface puts a screen full of vibrant filters across your images, letting you quickly cycle through them to find the right look. The results make any pictures an eye-popping work of art; handy image-editing tools and a library of funky picture frames help too. 1000 COLOR FILTERS -1000 uniquely designed filters 20 times more than other apps. -Save your favorite filters into Favorites for a much easier and faster access. -Colorburn provide unique filters to inspire your imagination. 98 GRID FILTERS -98 new designed grid filters to apply multiple filters to one picture. -Make professional designers and photographers take a new look at this world. VIDEO & LIVE PHOTO -Record videos with color filters and grid filters. -Take pictures with live photo in any type of device with iOS 9.1 or higher. SPLIT PHOTOGRAPHY -Support multi-shoot and merge to one picture with grid filters. -You can also make a contrast between front and rear camera. - Just tap the icon "3:4" to entry the split photography mode. PROFESSIONAL EDITING -Edit your existed photos with 1000 filters, vignette, exposure, brightness, contrast, rotate, mirror and adjust intensity of filters. -Use cropping patterns and frames to make your photo outstanding. -Open Colorburn in system's Photos app and have it serve as a filter extension. EASY SHARING -Especially unique square-prepare frames and 1080p pictures for Instagram. -Support to share your filtered picture to social media platforms such as Facebook, Twitter, Flickr, Tumblr and Dropbox. Be true to yourself. Get Colorburn to support you in your choice of lifestyle. Never give in, never go with the flow and never be out of filters! Be the trend-setter. Get Colorburn today. Have suggestions or problems? Contact us via email: support @ colorscamera. com
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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.
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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.
