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
Baseball Scorecard Classic
Baseball Scorecard Classic brings the authentic art of
$2.99 · In-app purchases
PRICE
$2.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.8
6 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 included18 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 Baseball Scorecard Classic: 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
Allow users to define custom scoring rules and player stats.
Assumption to check: Limited customization options for scoring rules.
Validate with people who use this workflow before building.
Hypothesis 2
Integrate sharing options via social media or link sharing.
Assumption to check: Difficulty in sharing scorecards with others.
Validate with people who use this workflow before building.
Hypothesis 3
Implement offline mode so users can score games without internet access.
Assumption to check: No offline functionality.
Validate with people who use this workflow before building.
Hypothesis 4
Provide detailed analytics on player performance over multiple games.
Assumption to check: Lack of player performance analytics.
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
Baseball Scorecard Classic brings the authentic art of scorekeeping to your iPhone and iPad. Whether you're at the ballpark, watching on TV, or scoring your kid's little league game, Baseball Scorecard Classic gives you the real scorecard experience — the way it was meant to be done. INSTANT MLB LINEUP IMPORT Start scoring in seconds. Import today's MLB lineups directly into your scorecard — players, numbers, and positions filled in automatically. AUTHENTIC SCORING NOTATION Every play recorded the classic way. Singles, doubles, triples, home runs, strikeouts, walks, errors and more — all displayed with traditional scorecard notation on a beautiful baseball diamond. SMART BASE STATE TRACKING The app tracks runners automatically after every at-bat. Confirm the base state with one tap, adjust if needed, and watch RBIs calculate themselves. COMPLETE SUBSTITUTION TRACKING Log pinch hitters, pinch runners, and defensive substitutions mid-game. Every player's stats stay intact — exactly like a real scorecard. PITCHING STAFF MANAGEMENT Track every pitcher's appearance. Innings pitched, strikeouts, earned runs, walks and more — all in one place. BATTING AROUND SUPPORT When a big inning happens, the app handles it. Score multiple at-bats per player per inning without missing a beat. CLASSIC DESIGN Two beautiful themes — aged cream paper for day games, deep navy for night games. Georgia serif fonts, traditional notation, the real scorecard feel on a modern device. EXPORT AND SHARE Share your completed scorecard as an image or PDF — perfect for keeping memories of great games. Baseball Scorecard Classic is built for fans who love the game and respect how it's been scored for over 150 years.
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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
Zustand
@react-navigation/native
react-native-paper
Firebase
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.
