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
Futsal Notes
This is a scoring and tracking app of futsal, created for players, coaches, funs.
$4.99 · In-app purchases
PRICE
$4.99
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 Futsal Notes: 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
Offer customizable tracking options for different match types.
Assumption to check: Limited customization options for match tracking.
Validate with people who use this workflow before building.
Hypothesis 2
Incorporate social sharing to enhance engagement.
Assumption to check: No social sharing features.
Validate with people who use this workflow before building.
Hypothesis 3
Provide advanced statistics and analytics for users.
Assumption to check: Lack of in-depth statistics.
Validate with people who use this workflow before building.
Hypothesis 4
Simplify the UI for a more streamlined experience.
Assumption to check: User interface may feel cluttered.
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
This is a scoring and tracking app of futsal, created for players, coaches, funs. ◎ Can quickly record minimum information in real time. ◎ Can add more detailed information later. ◎ Can show summary reports per match, per team, and per player. ◎ Can create reports in PDF format. ◎ Details of record items ◉ Goal ＊ Detail (right foot, left foot, head, free kick etc) ＊ Shot position on the field ◉ Shot ＊ Result (saved, off target, opponent's block etc) ＊ Shot position on the field ◉ Penalty kick ＊ Result (goal, saved, off target) ＊ Shot direction ◉ Corner kick ◉ Intercept ＊ Detail (pass intercept, dribble intercept etc.) ◉ Foul ＊ Penalized acts based on competition rules ＊ Penalties (direct or indirect free kick, penalty kick) ◉ Caution ＊ Penalized acts based on competition rules ◉ Sending-off ＊ Penalized acts based on competition rules ◉ Other functions ＊ Substitution ＊ Change of goalkeeper ＊ Penalty shootout ＊ Timeout ＊ Designation of the game captain ＊ Support up to the 4th period
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
React Navigation
React Query
Zustand
TypeScript
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.
