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
Green Screen by Do Ink
Green Screen by Do Ink – Green Screen and Chroma Key Video Editor for iPad and iPhone
$5.99 · In-app purchases
PRICE
$5.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.3
376 ratings · Below Average
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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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 Green Screen by Do Ink: map the core Education 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 editing tools and filters to enhance video creation.
Assumption to check: Limited features compared to other video editing apps
Validate with people who use this workflow before building.
Hypothesis 2
Improve stability and performance for a smoother user experience.
Assumption to check: Occasional bugs and crashes during recording
Validate with people who use this workflow before building.
Hypothesis 3
Implement a guided tutorial for first-time users to navigate the app.
Assumption to check: User interface can be confusing for first-time users
Validate with people who use this workflow before building.
Hypothesis 4
Integrate social sharing options and community feedback features.
Assumption to check: Lack of community features for sharing projects
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
Green Screen by Do Ink – Green Screen and Chroma Key Video Editor for iPad and iPhone Create high quality green screen videos, photos and GIFs in minutes with Green Screen by Do Ink, the powerful and easy-to-use chroma key video editor designed for the iPad and iPhone. Perfect for students, teachers, and content creators, this award-winning green screen app makes it simple to replace backgrounds, layer video elements such as photos, videos, text, drawings, animations and the live camera to produce engaging visual stories. Whether you are creating classroom presentations, YouTube videos, social media content, digital storytelling projects or school news broadcasts, Green Screen by Do Ink delivers high quality results without complicated editing tools. It's easy enough for a second grader to use! Powerful Green Screen and Chroma Key Editing -Instantly remove and replace green, blue screen or any highly saturated color background -Advanced chroma key controls for clean, precise results -Layer up to three video, photo, live camera tracks and/or custom animations -Real-time preview while recording -Export in HD and 4K resolution Turn any classroom, living room, or office into a production space. Perfect for Education and Classroom Video Projects Trusted by thousands of schools worldwide, Green Screen by Do Ink is one of the most popular education apps for the iPad and iPhone. Ideal for: -Student video projects -Digital storytelling -Book reports and history reenactments -Science and STEM presentations -School news broadcasts -Language learning videos -Creative arts integration The intuitive interface makes it easy for elementary, middle and high school students to create polished videos independently. That's why it was named a "Best New App in Education" and a winner of a "Best App for Teaching and Learning" by the American Association of School Librarians. Designed for Creators of All Ages -Simple drag-and-drop video layering -Import photos and videos from your camera roll or cloud storage -Create custom animations -No ads -No in-app purchases -No wifi needed -Safe for classrooms and shared devices Whether you are a teacher or student who wants to create interesting visual presentations or a creator producing short films, tutorials, or social videos, Green Screen by Do Ink gives you high quality visual tools without the learning curve. Create Move Magic Anywhere With just an iPad or iPhone, you can produce stunning green screen videos, immersive presentations, and creative storytelling projects from anywhere. Tell a story, explain an idea, and express yourself in creative and unique ways. Download Green Screen by Do Ink today and start creating high-quality chroma key videos with ease.
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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
react-navigation
@react-native-async-storage/async-storage
expo-camera
expo-permissions
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.
