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
NFL Fantasy Football
This season, there's a new NFL team competing for a chance in the Super Bowl — yours! With NFL Fantasy, the official fantasy football game of the NFL, you're in control of your very own NFL team
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.6
233,996 ratings · Top 15%
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 included19 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 NFL Fantasy 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
Implement advanced sorting and filtering for better team management.
Assumption to check: Difficulty in managing numerous players effectively.
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate live scoring updates for a more engaging experience.
Assumption to check: Limited real-time updates during games.
Validate with people who use this workflow before building.
Hypothesis 3
Provide a clear onboarding process with tutorials and tooltips.
Assumption to check: Confusing user interface for new users.
Validate with people who use this workflow before building.
Hypothesis 4
Offer clearer explanations of benefits for each subscription tier.
Assumption to check: Subscription model lacks clarity.
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
This season, there's a new NFL team competing for a chance in the Super Bowl — yours! With NFL Fantasy, the official fantasy football game of the NFL, you're in control of your very own NFL team. Are you ready to build the next football dynasty? Start your season by drafting a roster of real NFL players to join your team. Then, prepare for a new head-to-head matchup every week by setting your lineup and tuning in to NFL games to watch your player's action on the field turn into fantasy points for your team. In a work league with a real hotshot? NFL Fantasy comes equipped with the tools you need to make it to the top, including NFL Fantasy-exclusive features like Next Gen Stats and all-new player comparison tools. Looking to be the next Commissioner? Start your very own league and customize the rules however you want. Invite friends and family to compete with you and start your own football tradition. Get closer to the game than ever before with the official fantasy football game of the NFL. Always 100% free. There’s a lot to look forward to in 2025: + Our draft client makes drafting easy and fun. + Track your fantasy scores while streaming the NFL Network and live local and primetime games. It's the ultimate fantasy game day experience.* + Fantasy Stories - See a ring around a player’s headshot? Click to watch exclusive player analysis, news, and sideline footage. + Use Compare Players to quickly find the best player for your roster. + Waiver Report - learn the outcome of all of your waiver claims. + A weekly Matchup Recap gives you a customized report of your and your opponent's performance. + Celebrate your league's history and achievements in Hall of Fame. Plus, all of the fantasy football features you expect from the NFL: + Create a league in minutes to start your own fantasy football tradition, or compete against other NFL fans in a public league. + Draft players live in-app. + Perfect your draft strategy by participating in a Mock Draft. + The NFL Fantasy-exclusive Optimize Lineup feature makes fantasy football approachable for players of all skill levels. + Best in class Player Profiles include all of the data and expert analysis fans need to make informed roster decisions, including NFL Fantasy-exclusive features like Next Gen Stats and game video recaps. + Catch up with official stats, news, and injury updates direct from NFL experts. + The same great features and design on your iPhone and your iPad. …and more! *Geographic and device restrictions apply. Local & primetime games only. Data charges may apply. Privacy Policy: https://www.nfl.com/help/privacy Terms and Conditions: https://www.nfl.com/help/terms This app features Nielsen’s proprietary measurement software which contributes to market research, like Nielsen’s TV Ratings. Please see http://priv-policy.imrworldwide.com/priv/mobile/us/en/optout.html for more information.
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
Axios
React Navigation
Redux
React Query
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.
