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
Home Field ScorebooK
The baseball and softball scorekeeping app for iPhone and iPod touch that works like a pen-and-paper scorecard and looks and feels like a built-in app with Home Field Advantage™ and Player To Be Named Later™ features ...
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.2
47 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.
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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/
Preview a sample Build Kit No email needed
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 Home Field ScorebooK: 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 real-time updates with WebSockets for instant score changes.
Assumption to check: Difficulty in live score updates during games
Validate with people who use this workflow before building.
Hypothesis 2
Expand to include more sports and customizable game rules.
Assumption to check: Limited sports support
Validate with people who use this workflow before building.
Hypothesis 3
Design a cleaner, more organized UI for easier navigation.
Assumption to check: User interface clutter
Validate with people who use this workflow before building.
Hypothesis 4
Optimize app performance for lower-end devices.
Assumption to check: Inconsistent performance on older devices
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 baseball and softball scorekeeping app for iPhone and iPod touch that works like a pen-and-paper scorecard and looks and feels like a built-in app with Home Field Advantage™ and Player To Be Named Later™ features to let you sit down and start scoring right away to create scorecards, game logs and box scores to print and share! Use it online or offline -- no online accounts or hidden fees needed to score games at any level from Little League to Major League Baseball. Don't worry, you own your own data (unlike some of the "free" scoring apps.) The focus of Home Field ScorebooK is to capture all of the plays, as quickly and as intuitively as possible. Player and team stats are recorded, but not yet displayed. Don't worry: they'll be there in a future release! IN FUTURE RELEASES: • View, save and share player and team statistics • Share game updates on social media • Make changes to completed games • Use advanced rules for softball, youth and recreational leagues • And many more features...
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
react-navigation
zustand
expo-av
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.
