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 Predicts
Download FanDuel Predicts and prove you called it
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.8
6,449 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 Predicts: 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 a robust search and filtering system.
Assumption to check: Users report difficulty in finding relevant predictions.
Validate with people who use this workflow before building.
Hypothesis 2
Create a clearer pricing structure and trial options.
Assumption to check: In-app purchases can be confusing.
Validate with people who use this workflow before building.
Hypothesis 3
Expand categories and allow user-generated predictions.
Assumption to check: Limited prediction categories.
Validate with people who use this workflow before building.
Hypothesis 4
Optimize backend calls and improve caching.
Assumption to check: Performance issues with loading data.
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
Download FanDuel Predicts and prove you called it. Built for fans who want to put their knowledge to the test. Will New York outscore Los Angeles? Will Atlanta cover against Miami? From World Soccer, Basketball and Hockey to award show winners and Bitcoin – if it’s happening, there could be a prediction for it. FanDuel Predicts is where hot takes meet simple decisions. Choose “Yes” if you think an event will happen, or “No” if you don’t. Then hold your position or sell early (if available). It’s your call. Designed to be fast, intuitive, and simple to use. Built by FanDuel in collaboration with CME Group, owner of one of the world’s most trusted financial exchanges. • Available to trade in all 50 states. • Trade on sports, finance, culture, commodities & more. • Sports are only available in: AK, AL, CA, DE, FL, GA, HI, ID, MN, NE, NM, ND, OK, RI, SC, SD, TX, UT. • Secure and trusted: powered by CME Group & CDNA markets. • Built-in learning tools available to help you predict with confidence. How to Get Started: • Download FanDuel Predicts. • Create an account or log in with your existing FanDuel username. • Explore events and live sports games. • Make a prediction and follow your results in real time. Download now and back your take. Disclaimer: All derivatives contracts are offered and accounts are carried by FanDuel Prediction Markets LLC, a registered futures commission merchant. 18+. Trading is risky, always Trade Responsibly. Manage your activity with our Consumer Protection tools. If your activity is becoming a problem, support is available: call 1-800-522-4700. Futures, options on futures, and cleared swaps trading involves significant risk and is not appropriate for everyone. Please carefully consider if it's appropriate for you in light of your personal financial circumstances. Read the Risk Disclosures for more information about the risks associated with trading.
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 Navigation
Axios
React Query
React Native Reanimated
Expo
TypeScript
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.
