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
Rebound Score Tracker
Rebound Score Tracker lets you track scores for a wide variety of sports directly from your wrist
$0.99 · In-app purchases
PRICE
$0.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
N/A
No ratings yet
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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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 Rebound Score Tracker: 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
Include visual graphs and insights into performance trends.
Assumption to check: Difficulty in tracking detailed statistics over time
Validate with people who use this workflow before building.
Hypothesis 2
Allow users to customize scoring rules and game types.
Assumption to check: Limited customization for game settings
Validate with people who use this workflow before building.
Hypothesis 3
Implement share functionality for scores and achievements.
Assumption to check: No social sharing options
Validate with people who use this workflow before building.
Hypothesis 4
Add challenges and rewards to motivate users to track their scores.
Assumption to check: Lack of user engagement features
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
Rebound Score Tracker lets you track scores for a wide variety of sports directly from your wrist. Just select your sport, set the match format if needed, choose the starting player, and start counting points. Simply tap the your or opponents score on your Apple Watch to update the score for each team/player. The app automatically handles serve changes, set transitions, and match completion where applicable. No scrolling or typing — just a tap, and you’re back in the game whether it is a football, padel or streetball, Rebound Score Tracker keeps your game moving without any distractions. Currently, Rebound Score Tracker supports: American Football Badminton Baseball Basketball Beach Volleyball Field Hockey Floorball Football Futsal Handball Ice Hockey Lacrosse Padel Pickleball Rugby Softball Squash Streetball Table Tennis Tennis Volleyball and more sports will be added over time. Key features: Quick Scorekeeping: Start scoring immediately after selecting your sport and match settings. Match Formats: For many sports — mostly racket sports — players can choose between standard formats (e.g., 2 or 3 winning sets) or a casual ‘party’ format for unlimited game, perfect for relaxed games with friends. Starting Player: Choose who serves or starts first, or let the app select randomly for you. Favorites: Mark your most-played sports as favorites for faster access. Watch-Only Experience: Fully functional on Apple Watch, no iPhone app required. Clean and Simple Interface: Designed for fast, distraction-free scorekeeping during any match. Why Rebound Score Tracker? Never miss a point again — score anywhere, anytime. Rebound Score Tracker is perfect for casual matches, competitive games, or any sports session where keeping accurate scores is essential. Focus on playing, not calculating points. I am constantly working to add more sports and features to make your experience even better. Your feedback helps shape the next updates! Download Rebound Score Tracker today and take your scorekeeping to the next level — all from your Apple Watch.
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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
@react-navigation/native
@react-native-async-storage/async-storage
axios
expo-vector-icons
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.
