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
Prodefy
Prodefy — Your 2026 World Cup Bracket
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.8
9 ratings · Top 50%
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 included17 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 Prodefy: 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
Include a wider range of exercises with detailed instructions and videos.
Assumption to check: Limited exercise variety and descriptions
Validate with people who use this workflow before building.
Hypothesis 2
Simplify navigation and reduce button overload for a cleaner UI.
Assumption to check: Cluttered interface with too many buttons
Validate with people who use this workflow before building.
Hypothesis 3
Implement robust tracking features with real-time updates and analytics.
Assumption to check: Inconsistent performance tracking
Validate with people who use this workflow before building.
Hypothesis 4
Add social sharing and community features for motivation and support.
Assumption to check: Lack of community 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
Prodefy — Your 2026 World Cup Bracket The biggest World Cup in history is about to begin: 48 teams, 3 countries, and 104 matches. Who is the true football expert in your group? It’s time to prove it. Prodefy is the most complete free bracket app. Create your 2026 World Cup pool in less than 2 minutes, invite your friends via WhatsApp, and start competing! HOW IT WORKS Predict the score of every match and earn points: 6 points for an exact score. 3 points for predicting the correct winner or a draw. Real-time Rankings: Standings update automatically after every match. It’s that simple! CREATE YOUR FREE BRACKET Set up your group with up to 15 friends, family members, or coworkers. Forget about messy Excel sheets and complications. Customize prizes and invite others via a direct link or WhatsApp. You can also join public groups and compete against users from all over the world. LIVESCORES AND STATISTICS Follow every match live with instant scores, confirmed lineups, detailed stats, and minute-by-minute updates. You won’t need any other app to stay informed. LIVE CHAT Discuss matches in real-time with your group. Use GIFs, mentions, and reactions to fuel the rivalry. Boring brackets are a thing of the past. STRATEGIC POWER-UPS Use tactical advantages to climb the global ranking (each power-up can be used only once per tournament): Double Points: Double the points for a specific prediction. Late Change: Modify your prediction up to 45 minutes after kickoff. Spy: Reveal a rival's hidden prediction. 50+ TOURNAMENTS We go beyond the World Cup. Compete simultaneously in: Champions League, Copa América, Copa Libertadores, and more. Premier League, La Liga, Serie A, and Bundesliga. REAL PRIZES AND 100% FREE Prizes: Groups can set their own rewards for the top leaders. No Costs: No hidden fees, no mandatory subscriptions, and no credit card required. Just download and play. Available in: English, Spanish, and Portuguese. Ready to show who's boss? Download Prodefy and set up your bracket now.
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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
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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.
