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
Wikipedia
The official Wikipedia app for iOS helps you explore the world’s largest free knowledge project — ad-free and free of charge, forever
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.3
6,273 ratings · Top 30%
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/
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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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Wikipedia: map the core Reference 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
Implement a more advanced search algorithm with filters.
Assumption to check: Search functionality can return irrelevant results.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the navigation structure and provide onboarding.
Assumption to check: Navigation can feel cluttered for new users.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to download articles for offline reading.
Assumption to check: Offline access is limited.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce personalized content recommendations based on user interests.
Assumption to check: Content can be overwhelming without curation.
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
The official Wikipedia app for iOS helps you explore the world’s largest free knowledge project — ad-free and free of charge, forever. With 60+ million articles in nearly 300 languages, your favorite encyclopedia is always at your fingertips. Why you’ll love this app Free, open, and ad-free Wikipedia is written and verified by volunteers worldwide, supported by the nonprofit Wikimedia Foundation. No ads, no tracking — just knowledge you can trust. Search smarter, discover more Find the information you need without distraction. Search across 300 languages, explore trending and breaking news through a personalized feed. Add knowledge to your Home Screen Use widgets for quick access to trending articles, featured content, or the “Picture of the Day,” right from your Home Screen. Read your way Choose from light, sepia, dark, or pure black themes. Adjust text size and image dimming for comfortable reading anytime, anywhere. Explore nearby places Learn about landmarks and locations near you — or places you dream of visiting — through map-based article discovery. Stay connected offline Save articles to custom reading lists and access them offline — perfect for travel or learning without internet access. Share and continue seamlessly Share articles and images with friends, or use Handoff to keep reading across your Apple devices. Get insights into your activity See your own reading and contribution activity on Wikipedia with personalized insights that help you understand and celebrate how you use engage with Wikipedia. Stay organized with tabs Open multiple articles in tabs and switch between them with ease, just like in a browser. Compare topics, keep your place, and dive deeper without losing track. Join the conversation Read and reply to article discussion pages, and get notifications when discussions you follow are updated. Contribute on the go Manage your Watchlist to help keep Wikipedia accurate and up to date. Additional Information Feedback: In the app, go to Settings → Send app feedback. Contribute to translations: https://translatewiki.net/wiki/Translating:WikimediaMobile Source code: https://github.com/wikimedia/apps-ios-wikipedia Privacy Policy: https://m.wikimediafoundation.org/wiki/Privacy_policy Terms of Use: https://m.wikimediafoundation.org/wiki/Terms_of_Use About the Wikimedia Foundation: https://wikimediafoundation.org/
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.
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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.
