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
Gwin: Sportsbook For Cash &Fun
Gwin offers a groundbreaking predictive gaming experience that is engaging, inclusive, and interactive for all users.
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.3
4,071 ratings · Top 30%
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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included15 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 Gwin: Sportsbook For Cash &Fun: map the core Sports 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 range of sports and betting types.
Assumption to check: Limited betting options compared to competitors
Validate with people who use this workflow before building.
Hypothesis 2
Implement a chat support feature for instant assistance.
Assumption to check: Slow customer support response times
Validate with people who use this workflow before building.
Hypothesis 3
Create an onboarding tutorial to guide users through the app.
Assumption to check: Confusing user interface for new users
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
Gwin offers a groundbreaking predictive gaming experience that is engaging, inclusive, and interactive for all users. Place your picks across a wide range of sports with Gwin’s vibrant social sportsbook, featuring thousands of diverse betting options for an unmatched experience! Share your bets on your social feed and watch as your followers react, comment, or Gwin your bet! At Gwin, we are committed to responsible gaming and safe play. Our platform includes several bet limit controls to help users manage their gaming habits in a healthy and balanced way. The sweepstakes available through the Gwin app are solely sponsored and managed by Gwin, Inc. Apple is not a sponsor of, nor affiliated with, or responsible for the sweepstakes. No purchase is necessary to participate. Gwin is available to residents aged 21+ in the US excluding AL, AZ, CA, CT, DE, GA, ID, IL, KY, LA, MD, MI, MN, MS, MT, NV, NJ, NY, PA, TN, SC, WA, WV. There is no real money gaming offered in the app; it is intended solely for entertainment purposes. Success in social sports gaming does not guarantee future success in real money gaming.
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
Supabase
Zustand
React Navigation
React Native Reanimated
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.
