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
Little League World Series
The excitement of the World Series can be downloaded in the new Little League® World Series app
Free
PRICE
Free
No in-app purchases
BUSINESS MODEL
Free
No overall Grossing estimate available
RATING
★ 4.2
137 ratings · Top 30%
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What's included16 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 Little League World Series: 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 push notifications for live game updates.
Assumption to check: Limited real-time updates on scores.
Validate with people who use this workflow before building.
Hypothesis 2
Enhance search functionality with filters.
Assumption to check: Difficulty in finding specific teams or games.
Validate with people who use this workflow before building.
Hypothesis 3
Add user accounts and team-following features.
Assumption to check: Lack of personalized content or team following.
Validate with people who use this workflow before building.
Hypothesis 4
Introduce multimedia content like videos and interviews.
Assumption to check: Unengaging news section.
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
The excitement of the World Series can be downloaded in the new Little League® World Series app. Fans can view schedules, watch highlights, follow teams, plan their experience, and so much more in the official LLWS App! With the LLWS App, fans can register to engage and participate with sponsors and partners at the on-site Fan Zone located at both the Little League Softball® World Series in Greenville, North Carolina, and the Little League Baseball® World Series in Williamsport, Pennsylvania. LLWS App Exclusive Features: •Custom on-site offers and notifications based on personal preferences •Enable notifications to receive news, scores, giveaways, and more •Team news, alerts, breaking news, ticket specials, and more right to your device •Fast access to watch the best LLWS highlight videos from all LLWS tournaments •View game schedules, brackets, teams, visitor information and more for each LLWS tournament •View and interact with Little League’s Facebook, Instagram, TikTok, Twitter, and YouTube feeds •Take photos using custom overlays in the FanCam, which lets you share your photos with Little League and post directly to your social accounts •Plan your experience, engage with QR codes, and much more •Check-in with sponsors and partners using your exclusive “Fan Pass” at the on-site Fan Zone at both the Little League Softball World Series and Little League Baseball World Series •Engage with video board promotions at the Little League Baseball World Series •Shop online at ShopLittleLeague.org Control your own Little League World Series experience and never miss a moment of the fun! Download the app today!
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
Axios
React Navigation
Zustand
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.
