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
The Yale Book of Quotations
Discover new and exciting quotations and proverbs to ignite your literary passions.
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 2.9
7 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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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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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 The Yale Book of Quotations: 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 advanced filtering options like author and category.
Assumption to check: Limited search functionality for quotes
Validate with people who use this workflow before building.
Hypothesis 2
Focus on improving UI/UX design and responsiveness.
Assumption to check: Low user ratings indicating poor user experience
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the paywall and provide clearer information about premium features.
Assumption to check: In-app purchase complexity for users
Validate with people who use this workflow before building.
Hypothesis 4
Add functionality to share quotes via social media or messaging apps.
Assumption to check: Lack of social sharing options
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
Discover new and exciting quotations and proverbs to ignite your literary passions. The Yale Book of Quotations app brings together a collection of over 13,000 quotes and proverbs from Yale University Press’s award-winning title The Yale Book of Quotations, edited by Fred R. Shapiro and the companion edition, The Dictionary of Modern Proverbs, compiled by Charles Clay Doyle, Wolfgang Mieder, and Fred R. Shapiro. The content has a unique focus on American quotations and proverbs, and includes topics from literary and historical sources to popular culture, sports, computers, science, politics, law, and the social sciences. The app will allow visitors to seek specific quotes, search by subject, or just enjoy browsing. The app provides a fun, highly-usable experience for lovers of words and language everywhere. The app provides easy-to-use features, including: * Full search for all entries within The Yale Book of Quotations and The Dictionary of Modern Proverbs * The ability to share favorite quotations and proverbs via email, Twitter, Facebook, and Evernote * Quotation of the Day feature * Complete offline use - no internet connection required * Universal app design, making it usable on multiple devices * "Retina Display" support * Hyperlinked cross-references for easy navigation * The ability to bookmark and organize entries in personal folders * Browse by author last name or by proverb keyword * Swipe through entries as if flipping through pages of the book * Access lifetime usage history of app ******* Reviews ******* "The Yale Book of Quotations…brings modern voices into the company of standbys like Shakespeare, Samuel Johnson and Mark Twain, who squeeze together and make room for B.B. King, Fran Lebowitz, and Stanislaw Jerzy Lec." -William Grimes, New York Times (The Gifts to Open Again and Again) "Not only is the The Yale Book of Quotations a more profoundly researched work than anything else to date, it is more comprehensive than any other quotation-reference work—the first, in fact, to emphasize modern and American sources and fully to represent popular culture, children's literature, sports, computers, politics, law, and the social sciences." -BookForum ****************************** Copyright: “The Yale Book of Quotations”, ©2006 by Fred Shapiro “The Dictionary of Modern Proverbs”, ©2012 by Yale University
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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
Axios
@react-native-async-storage/async-storage
Shadcn/UI
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.
