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
Keep up with the season wherever you go with the official app of the NFL
Free · In-app purchases
OVERALL US RANK
#44
Grossing · all categories
REVENUE (Est)
$361K/mo
$207K - $515K
RATING
★ 4.5
411,875 ratings · Top 15%
Evidence scope: #44 is the current overall US Grossing chart position. 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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for NFL: 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 caching strategies for faster loading.
Assumption to check: App can be slow to load content during peak times.
Validate with people who use this workflow before building.
Hypothesis 2
Ensure reliable data fetching and error handling.
Assumption to check: Occasional bugs in live score updates.
Validate with people who use this workflow before building.
Hypothesis 3
Add features for users to customize their news feed and notifications.
Assumption to check: Limited personalization options for users.
Validate with people who use this workflow before building.
Hypothesis 4
Standardize UI components for a more cohesive experience.
Assumption to check: Inconsistent user interface across different sections.
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
Keep up with the season wherever you go with the official app of the NFL. GET CLOSER TO THE ACTION: - Make the NFL app your central hub for game day and access available NFL content in one place. - Get up-to-the-minute scoring, in-game highlights and drive charts to track every play. - Go deeper into the game with breaking news, key stories, and insider analysis. - Stay connected with the NFL Channel and get FREE NFL content 24/7. START YOUR GAMEDAY WITH NFL+: - Stream live local and primetime regular season and postseason games on phone and tablet. - Watch NFL Network 24/7, including seven exclusive games in the 2026 NFL season! - Watch ad-free highlights from every game. - Listen to live game audio with home, away and national broadcasts for every game of the season. - Get NFL Films’ programming and other on-demand content across devices and ad-free. NFL+ PREMIUM HAS MORE NFL: - Access everything from NFL+ - Watch NFL RedZone across devices to catch every touchdown from every game, every Sunday afternoon during the regular season. - Relive gameday with game replays including full, condensed, and All-22 coaches' films across devices, all ad-free. - Get access to NFL Pro and over 95 unique player and team performance stats and All-22 film for an advanced analytics platform (available on desktop and mobile web). Subscription required for NFL+ and NFL+ Premium. Terms and Conditions Apply. NFL Network and NFL RedZone are available to stream on an authenticated basis for eligible subscribers of participating TV providers! The NFL app allows use of AirPlay when viewing all video-on-demand and select live content. However, the NFL app does not permit outputs from phones or tablets of live games, NFL RedZone or NFL Network to external displays via HDMI, Chromecast, AirPlay, Miracast or other similar streaming functionality. Privacy Policy: https://www.nfl.com/legal/privacy Terms of Service: www.nfl.com/legal/terms
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
React Query
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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.
