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
CrownCoins Casino
CROWN COINS CASINO
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
133,234 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 CrownCoins Casino: 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
Implement a premium subscription that removes ads.
Assumption to check: Frequent ads can disrupt gameplay.
Validate with people who use this workflow before building.
Hypothesis 2
Introduce new games regularly and seasonal events.
Assumption to check: Limited game variety can lead to boredom.
Validate with people who use this workflow before building.
Hypothesis 3
Provide clearer explanations for in-app purchases and better UI for purchasing.
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
Hypothesis 4
Create daily challenges and rewards to maintain user interest.
Assumption to check: User engagement tends to drop after initial use.
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
CROWN COINS CASINO. America loves it. You will too! PLAY. WIN. REDEEM. REPEAT. It’s really that simple. Why Players Across the U.S. Continue To Choose Crown Coins: 1. In Crowns We Trust. We pride ourselves in putting you first! A secure, safe and trusted platform guaranteed. 2. No Purchase Necessary at Crown Coins. Start spinning, feel the thrill, win big. 3. Winning: The reason we’re all here! Thousands of winners every. single. day. Winning at Crowns is the norm. See for yourself; join the norm, join the wins! 4. Win fast, redeem fast. A quick and easy process. One you can trust to get your winnings in your hands securely, quickly and smoothly! Win big and redeem now. 5. Bonuses? That’s our middle name! Daily, weekly, monthly- you name it. Crown Coins rewards it. 6. Variety of Games- All your favorites in one platform. Enjoy a huge selection of games: unique in-house and a huge selection of the classics you love. Expect high-energy bonus rounds, jackpot prize mechanics and interactive mini games here at Crown Coins. 7. Dynasty’s Loyalty Experience has your back. Play more. Earn more. Get rewarded with our loyalty program and a personal host tailored for our players. Invite only and exclusive to our highest tiers, hope to see you there. 8. A Genuine Casino Feel with HD graphics and immersive design that replicates the look and feel of playing in a real casino but at the click of a button. 9. Our Customer Support team works around the clock for you with live messaging and quick responses. We got you, 24/7! The Crown Coins way. 10. Low Play Requirement. Spin on it, win on it, it’s yours! Your crown awaits. Crown Coins Casino is built for players who trust their luck and chase the thrill! No purchase necessary, just pure excitement from the very first spin. With bonuses rolling in for all occasions, there’s always something waiting for you the moment you join. And guess what, winning doesn’t end there... take part in our Live Bingo events at Crowns every week! Your life-changing win is calling you. Play the Crown Coins way. - Disclaimer: CrownCoins Casino's offering is intended for entertainment purposes only. We do not offer any real-money gambling. Our offering is sponsored and administered by Sunflower LTD. Apple Inc. is not a sponsor of, affiliated with or responsible with this offering. No purchase necessary. Void where prohibited by law. 19+. View our Terms of Service at: https://crowncoinscasino.com/pages/terms-of-service Contact Customer Support at: https://help.crowncoinscasino.com
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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
Expert
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.
