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
Modern English Etymology
This app offers a dictionary of modern English etymology
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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 included15 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 Modern English Etymology: 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
Incorporate interactive elements like quizzes to enhance learning.
Assumption to check: Limited user engagement features, such as quizzes or games
Validate with people who use this workflow before building.
Hypothesis 2
Add social sharing options to discuss words with friends.
Assumption to check: Lack of community features for sharing discoveries
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline access for user-favorited words.
Assumption to check: No offline access to saved words
Validate with people who use this workflow before building.
Hypothesis 4
Introduce personalized word suggestions based on search history.
Assumption to check: No personalized recommendations based on usage
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
This app offers a dictionary of modern English etymology. The classic dictionary contains most of the more common words, plus slang, archaic words and phrases, and common foreign words. Roots are identified, cross-references to words with similar roots are listed and colloquial usages and alternate spellings are given. In each entry, roots in Anglo-Saxon, Old Norse, Greek or Latin, Old and modern French, Anglo-Indian, German, African, Spanish, etc., are identified; in hundreds of cases, especially odd or amusing listings, earliest known usage is mentioned and sense is indicated in quotations from Dickens, Shakespeare, Chaucer, "Piers Plowman," Defoe, O. Henry, Spenser, Byron, Kipling, and so on, and from contemporary newspapers, translations of the Bible, and dozens of foreign-language authors. ● Topics: - Over 100 topics - Discover words in the same topic ● Other features - Save an entry - Search an entry - Words of the day - Advanced search ● If you want to give feedback or suggest a new feature, please send us an email. We love getting feedback from users.
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
React Native
Expo
Supabase
react-navigation
react-query
@supabase/supabase-js
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.
