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
Dictionary and Thesaurus Pro
Get the world's most comprehensive ad-free dictionary and thesaurus with extensive offline dictionary content and synonyms
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.9
2,563 ratings · Top 5%
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/
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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 Dictionary and Thesaurus Pro: 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 local caching of data for offline use.
Assumption to check: Limited offline accessibility
Validate with people who use this workflow before building.
Hypothesis 2
Design a cleaner, more focused interface.
Assumption to check: Cluttered UI
Validate with people who use this workflow before building.
Hypothesis 3
Optimize search algorithms for faster results.
Assumption to check: Slow search results
Validate with people who use this workflow before building.
Hypothesis 4
Integrate multiple dictionaries for comprehensive definitions.
Assumption to check: Inadequate definitions for some words
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
Get the world's most comprehensive ad-free dictionary and thesaurus with extensive offline dictionary content and synonyms. Dictionary Pro is the premium version of The Free Dictionary app, featuring: * No ads. * A comprehensive English offline dictionary and offline thesaurus. * Offline dictionaries in 13 other languages. * Offline translations of English into more than 40 languages. * Dozens of other offline translation options. Rated #1 app in the App Store in the paid reference category in 109 countries 2011–2019 (Source: http://www.appannie.com/apps/ios/app/492085918/app-ranking/#device=iphone&type=best-ranks) Plus TheFreeDictionary's classic app content: * Find every word you search for. Get results from trusted sources: Webster's Dictionary Roget's Thesaurus The American Heritage Dictionary + More than 100 dictionaries and encyclopedias from these top publishers: McGraw-Hill Houghton Mifflin HarperCollins Random House Elsevier + More! * Learn the word. Clear definitions, example sentences, etymologies, illustrations, and more. * Learn how to say it. Play audio pronunciations and hear it pronounced. * Learn something new. Word of the Day and other fresh daily content. * Find the perfect synonym fast. East-to-use Thesaurus with synonyms, antonyms, and related words. * Explore topics in-depth. Multiple specialty dictionaries and encyclopedias: Medical Legal Science Financial Idioms Acronyms and Abbreviations + More! * Watch idioms in action. View idioms videos inside the app and see idioms and slang explained. * Play word games. Spelling Bee, Hangman, and more. * Access dictionaries in 13 other languages, including: Spanish French German Italian Portuguese Russian Chinese + More! What makes Dictionary Pro the most user-friendly dictionary app? * Instantly look up words in apps or webpages! Just highlight the word you want to look up, tap "Share," then tap "More" in the bottom menu and turn on the "Define" option. You will then see a "Define" icon in the menu. Tap it to see the definition of the highlighted word! * Voice search. Just say the word to look it up. * Advanced Search options. * Look up the definition of any word on the page. Just highlight and tap "Definition." * Save bookmarks with one tap and sync them to all your devices. * Customize your homepage: Move, add, or remove articles, games, even local weather. * Jump to Definition, Thesaurus, or Translations with one button. * Navigate the app in more than a dozen languages with the multilingual interface. * Adjust font size. * Share your favorite definitions and articles via social networks, email, or text. EXCLUSIVE * Earn meals for hungry children through The Free Dictionary's partnership with the World Food Program—just by using the app! Not convinced? Read our reviews to see why our users say this is the best dictionary app they've ever used. How do we do it? Farlex is a leader in dictionary apps. We work with the best publishers to bring together trusted content in the most comprehensive, authoritative dictionary apps on the market. Find our other apps by searching "Dictionary by Farlex" in the App Store. * For app developers: The Free Dictionary app can be accessed by other apps with API calls (Contact Farlex for instructions).
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.
