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
English Synonym and Antonym
This app is designed to help you learn and differentiate the shades in meaning and usage between synonyms and antonyms
$1.99 · In-app purchases
PRICE
$1.99
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 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for English Synonym and Antonym: 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 a larger database of words and phrases.
Assumption to check: Limited vocabulary compared to comprehensive dictionaries
Validate with people who use this workflow before building.
Hypothesis 2
Add quizzes or word games to increase interaction.
Assumption to check: Lack of user engagement features
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline access to saved words.
Assumption to check: No offline functionality
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize themes and font sizes.
Assumption to check: Minimal customization 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
This app is designed to help you learn and differentiate the shades in meaning and usage between synonyms and antonyms For example: ability and capability are synonyms. However, there is fine distinction between them. If you have an ability, it means you know how to do something. If you have a capability, it means you have the power to do something. Buying uranium gives a country capability of making nuclear weapons, but first they need scientists with the ability to do the work. Each word will be explained in details with information about usage and origin. You "alleviate" your pain, but "assuage" your unpleasant feeling. If you are preparing for GRE, GMAT, SAT, ACT, IELTS, TOEFL, etc. this app will be very useful to you. It helps you to expand your vocabulary and improve your reading skills. SYNONYM • Over 500 headwords with meaning and synonyms • Tap the entry to see the detailed explanation, usage and origin. You will learn how to distinguish the difference in meaning between the words. Then, you will learn which word is used in which context • 10 units • Flashcard: browse through flashcard to learn all entries in one unit • Quiz: choose a word that has synonyms in the question ANTONYM • Over 1900 headwords with meaning and antonyms • Tap the entry to see the detailed explanation, usage and origin. You will learn how to distinguish the difference in meaning between the words. Then, you will learn which word is used in which context • 38 units • Flashcard: browse through flashcard to learn all entries in one unit • Quiz: choose a word that has antonym in the question WORD • Over 7000 words • Tap a word to see detailed meaning and usage • Use translation tool to translate it to your language • Use pronunciation tool to learn how it is pronounced • 138 units • Flashcard: browse through flashcard to learn all entries in one unit • Quiz: choose a word that has meaning in the question SENTENCE • Over 28000 sentences from various news • Tap a sentence to read the full article • News source includes The New Yorker, Slate, Washington Post, BBC, Forces, Wikihow, The New York Times, PubMed, Wikipedia, Britannica, the Economist, Unicef, Science, etc. LIST • You can create your own lists and add entry into that list • Use this feature to create related entries, entries that you feel difficult or entries that you have known OTHER FEATURES • Bookmark • Search for an entry • Learn 5 entries a day • Translation • Pronunciation
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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
Supabase
Zustand
React Navigation
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.
