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
Cue Lab | Shots & Layouts
THE MOST POWERFUL POOL AND BILLIARDS DIAGRAMMER
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
170 ratings · Top 15%
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/
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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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Quick prompt
Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.
// RORK SYSTEM PROMPT
Rork plan preview for Cue Lab | Shots & Layouts: 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
Incorporate a user-generated content feature to allow users to create and share their own drills.
Assumption to check: Limited variety of drills and layouts
Validate with people who use this workflow before building.
Hypothesis 2
Provide a clear explanation of benefits and a free trial for premium features.
Assumption to check: Subscription model can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Implement robust testing and error handling for video components.
Assumption to check: Some users report bugs in video playback
Validate with people who use this workflow before building.
Hypothesis 4
Simplify UI by reducing clutter and improving navigation.
Assumption to check: User interface can 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
THE MOST POWERFUL POOL AND BILLIARDS DIAGRAMMER • Diagram individual shots, drills, entire layouts and sequences with just a few swipes and taps • Start with an existing rack of 8 ball, 9 ball, 10 ball or even 14.1 (straight pool) • Intuitive gesture based drawing allows you to draw lines and have balls bounce off rails and each other • Share to any other messaging or photo sharing app • Save to Camera Roll, Files and anything else you device supports PACKED WITH ADVANCED FEATURES • Drawing paths is fun and easy with live recording. Drag balls where you want and watch them bounce off rails and other balls. • Use 2 fingers to zoom and pan around the table so you can place balls and draw paths exactly where you need them. • Bend pathways to demonstrate extreme spin and massé shots. • Include target zones to demonstrate optimal positioning. • Bookmark a layout to easily diagram multiple solutions. • Add notes to describe shots, layouts and drills. Include a cueball diagram to show spin, draw or follow. PERFECT FOR INSTAGRAM AND SOCIAL MEDIA • Export diagrams in landscape or portrait (whichever orientation you're holding your device) • Export on transparent background so you can include them seamlessly in your own projects
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 Navigation
Axios
React Native Video
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Zustand
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.
