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
FC Barcelona Official App
No matter where you are in the world, FC Barcelona's official app is the perfect partner for loyal Culers like you
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
11,720 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 FC Barcelona Official App: 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
Allow users to customize news feeds based on favorite players or topics.
Assumption to check: Limited content personalization options
Validate with people who use this workflow before building.
Hypothesis 2
Optimize API calls and caching for smoother loading.
Assumption to check: Inconsistent loading times for articles
Validate with people who use this workflow before building.
Hypothesis 3
Include community interaction features such as comments and forums for fans.
Assumption to check: Lack of community features (forums, comments)
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the layout and prioritize key information for better user experience.
Assumption to check: Cluttered UI with too much information
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
No matter where you are in the world, FC Barcelona's official app is the perfect partner for loyal Culers like you. Download for free and access all these benefits: MATCH DAY LIVE COVERAGE Access the app on match days and see live statistics and results, exclusive content from the club, breaking news, coach's press conferences, and much more. EXCLUSIVE CLIPS YOU WILL ONLY FIND HERE Goals, top action, behind-the-scenes video, classic videos, unique footage of our players... Experience Barça like never before in short vertical videos! STAY UP-TO-DATE WITH BARÇA STORIES Keeping up to date at Barça has never been so easy. Follow Barça’s day-to-day in real-time and dynamic Stories. BE THE FIRST TO RECEIVE OFFICIAL NEWS Everything is just gossip until you receive our official news. Make sure to turn push notifications on and you’ll always be the most up-to-date person in the room. SHARE YOUR OPINION WITH CULERS AROUND THE WORLD Who has been the man of the match? Who do you think should start in the next game? Have your say and check out official club polls to see what other fans think. TEST YOUR BARÇA KNOWLEDGE AND CHALLENGE FRIENDS Do you think you know everything about Barça? Take part in our daily quizzes and prove you're the ultimate fan! COMPETE AGAINST OTHER FANS Show off your Barça expertise and climb to the top of the Match Day Challenge leaderboard by predicting the score, rating the game, and acing the match quizzes. PREPARE YOURSELF FOR A VISIT Whether it's tickets for the next match, a museum pass, or the latest kit you're after, you’ll find it all in the online shop. Força Barça! Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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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
Supabase
React Navigation
Axios
Zustand
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.
