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
Fanatics: Shop NFL, NBA & MLB
Dive into the world's largest collection of officially licensed sports apparel, jerseys, and fan gear for every team, player, and league
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
190,744 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.
Build your own version
Build Kit
Make this idea yours
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 included17 files
A product spec, phased build plan, differentiation notes, and screen references.
- START_HERE
- AGENTS
- EVIDENCE
- SPEC
- BUILD_PLAN
- DIFFERENTIATION
- skills/
- screens/
Preview a sample Build Kit No email needed
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 Fanatics: Shop NFL, NBA & MLB: 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
Implement advanced filtering and sorting options.
Assumption to check: Limited product filtering options
Validate with people who use this workflow before building.
Hypothesis 2
Simplify UI to enhance user experience.
Assumption to check: Cluttered interface with too many options
Validate with people who use this workflow before building.
Hypothesis 3
Optimize image loading and caching.
Assumption to check: Slow loading times for images
Validate with people who use this workflow before building.
Hypothesis 4
Offer multiple payment methods for user convenience.
Assumption to check: Limited payment options
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
Dive into the world's largest collection of officially licensed sports apparel, jerseys, and fan gear for every team, player, and league. Plus live scores, stats, schedules, games, and more. All in the Fanatics App. KEY FEATURES • FREE SHIPPING + RETURNS: Get free shipping and hassle-free returns. Track every order in the app. Order minimums apply. • EXCLUSIVE DROPS & COLLABS: Shop exclusive releases, limited-edition jerseys, premium sports apparel, and must-have gear — available only in the app. • OVER 1.5 MILLION PRODUCTS: Browse officially licensed products from the NFL, NBA, MLB, NHL, WWE, College Sports, global soccer, and more. • Up to 5% FANCASH BACK: Earn up to 5% FanCash back and redeem your rewards on more sports merchandise. • FREE GAMES: Put your sports knowledge to the test and play free daily pick ‘em games across all your favorite leagues. • LIVE SCORES & STATS: Follow your favorite teams and players with real-time scores, live stats, game schedules, standings and more. • COLLECTIBLES: Discover autographed jerseys and sports history with our curated collection of game-used gear and rare trading cards. SHOP Discover a better way to shop sports gear all in one place for fans who live and breathe the game. Fanatics offers the most complete selection of officially licensed merchandise, limited edition gear, and sports memorabilia. • The Fanatics App is your source for officially licensed apparel from every league including the NBA, MLB, NHL, NFL, WWE, global soccer and more. • Celebrate your team’s big win with championship gear. • Explore jerseys, hats, hoodies, throwbacks and more. • Shop authentic styles from premium brands like Nike, adidas, Under Armour, New Era, Lululemon, Mitchell & Ness, and more. • Collect autographed jerseys, rare trading cards, and game-used memorabilia, all verified for authenticity. LIVE SCORES Stay connected to every moment with real-time scores, stats, and updates that keep your fandom alive, even when you can’t catch the game. • Follow your favorite teams across every league: NFL, NBA, MLB, NHL, soccer, and more. • Get live scores, states, and updates all in one place • Pin your favorite teams to personalize your game feed STAY TUNED We’re always adding new features and exclusive drops, so keep your app updated to unlock the latest experiences and rewards you won’t find anywhere else. LEGAL App access open to all. No purchase necessary. US only. FanCash subject to additional terms and conditions - see FanCash Policy for details.
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
Zustand
Axios
react-navigation
Supabase
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.
