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
Word Check - Scrabble Words
Instantly check if a word is playable in Scrabble and other word games
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
3 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 included16 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 Word Check - Scrabble Words: 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
Enhance the database with a comprehensive word list.
Assumption to check: Limited word database may not include all valid Scrabble words.
Validate with people who use this workflow before building.
Hypothesis 2
Optimize the search algorithm for faster results.
Assumption to check: Slow performance when querying large datasets.
Validate with people who use this workflow before building.
Hypothesis 3
Add user accounts and favorite words feature.
Assumption to check: Lack of user personalization features.
Validate with people who use this workflow before building.
Hypothesis 4
Improve transparency and provide clear benefits for in-app purchases.
Assumption to check: In-app purchase process can be unclear.
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
Instantly check if a word is playable in Scrabble and other word games. Word Check gives you a fast, definitive answer with definitions included. Whether you're mid-game and need to settle a challenge, or studying to sharpen your skills, Word Check is the companion every word game player needs. KEY FEATURES • Instant Word Validation Type any word and instantly see if it's playable. Results include definitions so you can learn as you play. • Multiple Official Dictionaries Choose from three dictionaries: - NWL 2023 (NASPA Word List) — the standard for North American tournament play - CSW 2024 (Collins Scrabble Words) — the international tournament dictionary - NSWL 2023 (NASPA School Word List) — a family-friendly word list • Practice Quizzes Test your word knowledge with fill-in-the-blank quizzes. Study curated word lists, track your high scores, and choose from multiple difficulty levels to match your skill. • Clean, Focused Design No ads. No account required. No clutter. Just open the app and start checking words. Word Check is free to use with no in-app purchases. Built for Scrabble players, crossword enthusiasts, and anyone who loves words. Players love Word Check: - "Thanks for making a simple app that looks nice, and has no ads. Makes my scrabble dates with my wife that much more enjoyable." - "This is a fab app. Makes the game less contentious, haha" - "Thank you for respecting your users and making a perfect app" "Word Check" is not affiliated with the registered brand Scrabble®. Download now!
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 Navigation
React Native Elements
Redux
React Native Share
Expo
Firebase
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.
