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
Water Polo Log
Water Polo Log is a digital water polo scorebook: it keeps the book as the game runs and delivers the finished game sheet at the final buzzer
$9.99
PRICE
$9.99
No 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 included
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 Water Polo Log: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Water Polo Log is a digital water polo scorebook: it keeps the book as the game runs and delivers the finished game sheet at the final buzzer. Built to stand in for the official paper book, and just as happy running as a second book beside one: always added up, never a period behind. KEEP THE BOOK, LIVE - Log goals, exclusions, penalties, timeouts, cards, and more, grouped by period. - Tap any entry to fix it when the table gets hectic; nothing is locked away. - Foul and timeout tracking warns at the limits; the book stays yours to keep. THE GAME SHEET, DONE AT THE FINAL HORN - The game sheet builds itself as you log, in the format scorers already know. - Read it on screen any time, or print it or save it as a PDF the moment the game ends. - Score by period, personal fouls, timeouts, cards, and player stats, added up for you. YOUR DATA, YOUR DEVICE - Save the game log as a CSV file, or the whole game as a standard game-data file to share or archive. - Everything stays on your device until you choose to share it. WORKS WITH THE WATER POLO BOARD, WORKS WITHOUT IT Pair a Water Polo Board, a small receiver that reads a supported wireless scoreboard at the pool, and event times fill themselves in from the live game clock. No board? Everything works exactly the same: enter times by hand, or skip them entirely. Learn more at https://lgias.com/wpboard/ RULESETS Supports multiple different rulesets used around the world.
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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
Competitive pricing with generous free tier
Assumption to check: Expensive subscription
Validate with people who use this workflow before building.
Hypothesis 2
Focus on most-requested features first
Assumption to check: Missing features
Validate with people who use this workflow before building.
Hypothesis 3
Optimize for 60fps, fast load times
Assumption to check: Poor performance
Validate with people who use this workflow before building.
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
RevenueCat
BUILD KIT DIFFICULTY
Not assessed in a Build Kit yet.
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.
