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 Solitaire
Relax and enjoy Solitaire with absolutely no ads or micro-transactions.
$1.99 · In-app purchases
PRICE
$1.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
230 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.
Build your own version
Build Kit
Make this idea yours
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 Solitaire: 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
Offer a wider variety of themes and customization options.
Assumption to check: Limited customization options for card designs
Validate with people who use this workflow before building.
Hypothesis 2
Implement a more responsive update schedule to fix issues quickly.
Assumption to check: Infrequent updates leading to bugs
Validate with people who use this workflow before building.
Hypothesis 3
Balance ad placement to minimize interruption without sacrificing revenue.
Assumption to check: Ad frequency can disrupt gameplay
Validate with people who use this workflow before building.
Hypothesis 4
Introduce multiplayer modes for competitive play.
Assumption to check: Lack of multiplayer 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
Relax and enjoy Solitaire with absolutely no ads or micro-transactions. Cozy Solitaire was designed specifically to give you a relaxing and cozy solitaire experience. What makes Cozy Solitaire unique? Most solitaire apps are cluttered with ads, making playing anything but relaxing. Besides just being ad-free, Cozy Solitaire also has a fresh look that can be customized to fit your preferences. The effects and animations were created to be satisfying, without overdoing it. Lastly, Cozy Solitaire gives you an encouraging message every day when the daily goal is completed. FEATURES: No ads: Absolutely no ads or micro-transactions. Pay once and enjoy, ad-free forever. Klondike and FreeCell Solitaire included: Choose between Klondike or FreeCell Solitaire. Play 1 card draw or 3 card draw. Choose between winnable or random deals. Yukon, Spiderette, and Golf Solitaire available: The game includes 1 in app purchase to add 3 extra game modes for $1.99 USD. This purchase is completely optional and adds Yukon, Spiderette, and Golf Solitaire. If you don't want to be bothered by seeing the in-app purchase, you can even toggle it off in the settings menu. Customization: Customize to your heart’s content with over 150 different card backs. Choose between a variety of different backgrounds and card fronts to fit your unique taste. Backgrounds include plain colors and a selection of relaxing animated backgrounds. You can also customize the font size on the front of the card. Simple user interface: Enjoy a simple user interface that was thoughtfully designed to be easy to use and aesthetically pleasing. Satisfying experience: Sound effects and subtle vibrations make for a satisfying experience. Achievements: Complete a variety of achievements to unlock more card back designs. Daily Reward: Every day there will be a daily goal to complete to unlock an encouraging message for the day, similar to cracking open a fortune cookie at your favorite Chinese restaurant - so satisfying and cozy! Undo and hint: Use the undo button to go back up to 100 moves. Use the hint button if you get stuck and need help. Personalized Settings: Personalize the settings to suit your preferences. Play in left-handed mode, turn on dark mode, adjust the sound effect, ambience, and music levels, turn vibrations on or off, and show or hide the top user interface. LoFi Soundtrack: Lofi beats provide the perfect background music as you play. This chill soundtrack is great for a cozy and relaxing experience. You can also turn the music off if you prefer to play in silence. Download today! *Please note that this game is playable in portrait mode only. Landscape mode is not available.
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
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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.
