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
Crossword Master - Word Puzzle
Crossword Master is a turn-based word game where you and your opponent work together to complete a crossword puzzle while competing for the highest score
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
142,294 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Crossword Master - Word Puzzle: map the core Games 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
Introduce a wider range of puzzle types and difficulty levels.
Assumption to check: Limited variety of puzzles can lead to user boredom.
Validate with people who use this workflow before building.
Hypothesis 2
Offer a better ad-free experience through a premium option.
Assumption to check: Ads can interrupt the gameplay experience.
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the UI for in-app purchases and provide clearer benefits.
Assumption to check: In-app purchases can be confusing to navigate.
Validate with people who use this workflow before building.
Hypothesis 4
Implement a leaderboard and social sharing features.
Assumption to check: Lack of social features to compare scores with friends.
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
Crossword Master is a turn-based word game where you and your opponent work together to complete a crossword puzzle while competing for the highest score. Dive into this highly addictive experience and enjoy endless fun! Solve crosswords, outsmart your opponents, and become a word master! Discover a fresh take on daily crossword puzzles: draw letters from the deck, and craft words according to the clues. Inspired by Scandinavian-style crosswords, Crossword Master features clues within the cells to enhance gameplay convenience. Some of the clues are pictures, which adds an extra layer of challenge and fun! Crossword Master strikes the perfect balance between entertainment and a useful brain exercise. Each crossword puzzle is carefully designed to train your language skills, spelling, logic, and general knowledge. Explore thousands of words, enrich your vocabulary, and master the art of crossword games! How to play: - Your goal in this turn-based game is to craft words on the crossword board according to the clues and outscore your opponent. - Use blue cells with clues to guess words. Find the right fit for each letter from a set of five and place them one by one from the deck to start forming words. - Try to place all the letters from the deck in each turn to maximize your score. Every correct letter earns one point, with additional points awarded for completing words. Aim to construct longer words and multiple words in a single move for the highest scores. - Think strategically. Sometimes, holding back a crucial letter for a future move can help create a longer word and boost your score potential. What you get: • Engaging crossword game with smooth graphics and a modern look • Plenty of unique crossword puzzles for adults packed with countless words to unravel, keeping you hooked for hours! • Hints available to assist when you're stuck and need a clue • Auto-save ensures you can resume any unfinished crossword anytime without losing your progress • No time limit. Enjoy this crossword game at your own pace. Solve crossword puzzles anywhere, anytime, stretch your cognitive limits, and become a master of words!
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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.
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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.
