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
Cozy Crosswords
Cozy Crosswords is a calm, relaxing crossword puzzle game designed for slow, satisfying play.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
22 ratings · Top 15%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included17 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 Cozy Crosswords: 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
Add community-generated puzzles for varied content
Assumption to check: Limited variety of puzzles can lead to user boredom
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the in-app purchase process and clearly display benefits
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Offer an ad-free experience with a subscription model
Assumption to check: Ads can disrupt gameplay
Validate with people who use this workflow before building.
Hypothesis 4
Integrate social sharing and leaderboard features to enhance engagement
Assumption to check: Lack of social features
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
Cozy Crosswords is a calm, relaxing crossword puzzle game designed for slow, satisfying play. Each puzzle is a small crossword made up of 5 connected words, all related to a single clue. You solve the grid by dragging and placing letter tiles, creating a smooth, tactile experience that feels great to play. With 250 clues and over 500 different crosswords, Cozy Crosswords offers a wide mix of literal and thought-provoking challenges, all set to a gentle lo-fi soundtrack. FEATURES: Cozy Experience: Every interaction is designed to feel soft and satisfying, from smooth tile dragging to subtle sound effects and haptic feedback. The relaxed pace and calming music create a cozy space to think and unwind. Customization: Make the game your own with 40+ background colors, multiple tile colors and tilesets, different tile shapes, and a variety of fonts. Completing achievements unlocks new tilesets with carefully curated color palettes. Daily Crossword: A brand-new, randomly generated crossword is available every day. Solve it at your own pace and compare your time on the online daily leaderboard. Adjustable Difficulty: Adjust your difficulty as you choose. Pick easy for a simple, straightforward experience, or hard for a slower and thought provoking play. Normal difficulty provides the perfect middle ground. No ads. No in-app purchases. No power-ups or gimmicks. Cozy Crosswords is a clean, focused experience built around relaxing, bite-sized crossword puzzles. Whether you play for a minute or settle in for a longer session, Cozy Crosswords is meant to feel warm, peaceful, and deeply satisfying.
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
Zustand
React Navigation
@react-native-async-storage/async-storage
react-native-reanimated
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.
