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
FanDuel Fantasy
FanDuel Fantasy lets you make every moment more all season long! Draft your favorite players into your lineup for a chance to win real money prizes all season long! FanDuel gets you in on the daily and nightly action ...
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
222,406 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 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 FanDuel Fantasy: 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 better filter and sort options for contests.
Assumption to check: Difficulty in navigating through multiple contests quickly
Validate with people who use this workflow before building.
Hypothesis 2
Use algorithms to suggest contests based on user behavior.
Assumption to check: Lack of personalized recommendations for contests
Validate with people who use this workflow before building.
Hypothesis 3
Provide a more visual and interactive player selection experience.
Assumption to check: Limited player selection interface
Validate with people who use this workflow before building.
Hypothesis 4
Create a reliable notification system for live updates and changes.
Assumption to check: Inconsistent notifications for contest updates
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
FanDuel Fantasy lets you make every moment more all season long! Draft your favorite players into your lineup for a chance to win real money prizes all season long! FanDuel gets you in on the daily and nightly action for NFL, MLB, NCAAF, NBA, PGA, NHL, UFC, Soccer, and more! Want to create your own fantasy league? Build your custom contest on FanDuel, invite your friends, and play for real cash! Make sure to check out FanDuel for our latest promotions and bonuses for both new and returning fantasy players! Get full scores, news, data, and daily coverage of NFL, MLB, NBA, NCAA, NHL, Premier League Soccer and Champions League Soccer. Join the fun and start on the path to winning cash today! Whether your game is football, baseball, basketball, golf, or soccer, FanDuel has daily and weekly contests you’ll love. Plus, you have your own choice of contest options, from world-famous tournaments to beginner contests — where there are no experienced players allowed. FanDuel even lets you enter free games year round featuring all your favorite sports for a chance to win big prizes! WHY YOU’LL LOVE FANDUEL: - The choice is yours – Play Single Game and daily contests for NFL, MLB, NBA, PGA. NHL, EPL and UCL soccer, and many more fantasy sports you love - Cash prizes are waiting for you – Draft your fantasy lineup, track your scores and compete daily for prizes in one of our many fantasy contests - You don’t have to commit to season-long play – Make last-minute changes and draft the perfect team. Our Late Swap contests let you adjust the players on your roster right until their individual games start -Live draft - every game day - with Daily Snake Drafts! Play with friends or enter a public contest for your chance to win real cash prizes. Draft the best players available with no salary caps. Available now for the NFL, NBA, MLB, NHL, and PGA. - Share the fun with your friends – Our Friends Mode is a new take on the “traditional” fantasy league that lets you play FanDuel with your friends all season long. Create your league, draft teams, track live scoring, and keep track of rankings among your friends. Now is the perfect time to try daily fantasy! (For more details, see FanDuel.com) JOIN MILLIONS OF OTHER FANS ACROSS THE COUNTRY As featured in ESPN, Sports Illustrated, The New York Times, The Wall Street Journal and Yahoo Sports. US residents only. Users must be 18 or older (19 or older in AL, 21 or older in AZ, IA, LA, MA, VA). Users physically located in DE, ID, HI, MT, NV, and WA are not eligible to participate in paid contests. FanDuel makes no representation that participation in paid entry fantasy sports contests is lawful under Texas state law. Additional state limitations may apply. At FanDuel, we are committed to protecting our players and helping them manage their play in a responsible manner. We offer proactive tools, resources, and support to encourage healthy player behavior and deliver positive player experiences. For more information, visit https://www.fanduel.com/responsibleplay or the ""Responsible Play"" item in the account menu. For California privacy rights, see the Privacy link in our App Menu after Download. https://www.FanDuel.com/terms https://www.FanDuel.com/privacy
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
Supabase
React Navigation
Zustand
React Native Reanimated
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.
