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
433 | The Home Of Football
The 433 app is the ultimate football experience for every football lover
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 3.6
283 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for 433 | The Home Of Football: 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 user preferences for local teams and news.
Assumption to check: Limited local news coverage
Validate with people who use this workflow before building.
Hypothesis 2
Optimize image loading and data caching.
Assumption to check: Slow loading times for articles
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to customize their news feed based on interests.
Assumption to check: Lack of customization options
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the subscription options and clarify benefits.
Assumption to check: In-app purchase confusion
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
The 433 app is the ultimate football experience for every football lover. Whether you want to keep track of your team’s big match, stay up to date with all the latest news, kick back and watch some epic viral videos or simply test your footy knowledge with a variety of games… We’ve got you covered. Welcome to the home of football. MATCH CENTRE Find everything you need on matchday – fixtures, results, match stats, live line-ups – and get notifications when your teams score. Which team dominated possession? Who had the highest xG? How many of their shots were on target? How many yellow cards did the referee give? It’s all there, and more. PREDICTIONS Think you ‘know ball’ better than your friends? Here’s your chance to prove it! Create leaderboards with your friends and go head-to-head in daily predictions of matches from across the world. Enter into the general leaderboards and compete against all 433 users, with the chance to win prizes. WALLPAPERS Need a new football background for your phone? This is the app for you. Wallpapers are released every week, covering all the biggest players, clubs and national sides. QUIZZES Put your football knowledge to the test with a series of quizzes, interactive games and brain teasers. Want to find out who knows more about football: You or your friends? You can! Add your friends, complete quizzes, and keep track of each other’s ‘ball knowledge’ with leaderboards. NEWS Stay on top of the news and never miss any breaking stories coming out of your favourite clubs and leagues. Keep track of your team’s transfer developments, injury updates, unmissable quotes and reactions from across the football world. Be the first to find out about trending stories or when a transfer is nearing that all important ‘Here we go!’ VIRALS Want to see goals, saves, moments from games across the world? Want to feel the game from the fan’s perspective? Or do you just want to see some funny moments from famous players and coaches? Then look no further. Find daily uploads of viral moments from across the beautiful game!
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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.
SUGGESTED BUILD STACK
React Native
Expo
Zustand
Axios
React Navigation
Firebase
BUILD KIT DIFFICULTY
Advanced
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.
