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
Winible: Expert Sports Picks
Follow the sharpest creators in sports, get their picks the second they drop, and trade them right in the app
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
2,323 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 included16 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 Winible: Expert Sports Picks: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Follow the sharpest creators in sports, get their picks the second they drop, and trade them right in the app. Winible brings expert picks, analysis and trading together in one place. NEW: TRADE RIGHT FROM THE PICK See a play you like? Tap Trade now and you're in, with no switching apps. Every trade lands in your Portfolio, where you can track open and settled positions, cost, payout and price moves at a glance. DISCOVER TOP CAPPERS Browse featured and trending creators across NFL, NBA, MLB, WNBA, NCAAF, PGA and more. Follow the ones you trust, subscribe for their premium plays, and send a tip when they deliver. ALL YOUR PICKS IN ONE FEED Free plays and subscriptions from every capper you follow, in a single feed you can filter by sport. INSTANT PICK ALERTS Get a push notification the moment a new play is posted, so you're never late to a pick. FREE DAILY PLAYS Try picks from top creators at no cost before you subscribe. FUND IT IN SECONDS Deposit, trade and withdraw from your balance without leaving the app. PLAY THE ARCADE Quick, head-to-head skill games against real opponents. GOOD TO KNOW - Trading is available in eligible locations and is not available in Nevada. Identity and age verification required. - You must be 18 or older (21+ where required) to use Winible. - Picks and analysis are for informational and entertainment purposes. Past results don't guarantee future outcomes. - Please play responsibly. If you or someone you know has a gambling problem, call 1-800-GAMBLER. Download Winible and get your first free play in seconds.
Written user reviews are not shown here. Check current App Store reviews >
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 social feature for users to discuss picks.
Assumption to check: Limited user engagement features like community or chat
Validate with people who use this workflow before building.
Hypothesis 2
Provide user ratings for picks to enhance trust.
Assumption to check: Dependence on expert opinions can be misleading
Validate with people who use this workflow before building.
Hypothesis 3
Simplify the paywall and offer clearer descriptions of subscription benefits.
Assumption to check: In-app purchase confusion for users
Validate with people who use this workflow before building.
Hypothesis 4
Use algorithms to suggest picks based on user behavior and preferences.
Assumption to check: Lack of personalized recommendations
Validate with people who use this workflow before building.
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
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axios
react-native-reanimated
@react-native-async-storage/async-storage
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.
