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
Detroit Lions Mobile
This is the official mobile app of the Detroit Lions, presented by Ford
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.8
47,392 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 included15 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 Detroit Lions Mobile: 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 for news articles and schedules.
Assumption to check: Limited offline functionality.
Validate with people who use this workflow before building.
Hypothesis 2
Simplify the layout and prioritize key information.
Assumption to check: Cluttered UI with too much information.
Validate with people who use this workflow before building.
Hypothesis 3
Optimize API calls and use lazy loading.
Assumption to check: Slow loading times for news articles.
Validate with people who use this workflow before building.
Hypothesis 4
Allow users to customize their news feed based on favorite teams.
Assumption to check: Lack of personalization 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
This is the official mobile app of the Detroit Lions, presented by Ford. Make your iPhone, iPad or iPod Touch a unique part of your game day experience for Lions games. Catch breaking news of the team. Navigate your way around Ford Field with an Interactive Stadium Map. Become a part of an Interactive Lightshow. Explore augmented reality experiences. See real-time statistics for every drive. Watch video-on-demand clips of press conferences and player interviews. Follow pre-game previews and matchups. Stay in touch with the Lions anytime, anywhere, on your iPhone, iPad or iPod Touch. Features include: News: Real-time breaking news from the Lions, previews of upcoming matchups, post-game blogs Video: Video-on-demand clips of the Lions’ press conferences, coach and player interviews Photos: Gallery of game-time action Stats: Real-time statistics and scores from the official NFL stats engine, head-to-head stats of the matchup, player stats, drive-by-drive stats, box score, out-of-town scores around the league Standings: Division and conference standings Fantasy: Keep track of your favorite fantasy players Depth chart: Shown by offense, defense and special teams Social media: Aggregated twitter of the Lions’ official tweets, check in to the stadium on game-day, one-click tweet of all media items, one-click facebook posting of all media items Schedule: Schedule of upcoming games, and scores/stats of previous games from the season, ticket purchase for games Evolving home-screen: Pre-game, in-game, post-game, off-season countdown, draft-day Interactive Stadium Map Augmented Reality Live In-Stadium Camera Angles Follow us @yinzcam on Twitter for updates or to ask questions and provide feedback. Please note: This app features Nielsen's proprietary measurement software which contributes to market research, like Nielsen's TV Ratings. Please see https://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.
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BUILD KIT DIFFICULTY
Intermediate
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.
