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
Pool Trick Shot Diagrams
Understand (and try!) competition level pool trick shots with 120 pool table diagrams and descriptions
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
4 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 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 Pool Trick Shot Diagrams: 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
Expand library with user-generated content and community sharing.
Assumption to check: Limited diagrams for advanced trick shots
Validate with people who use this workflow before building.
Hypothesis 2
Add features for users to comment, rate, and share tricks.
Assumption to check: No social features or community engagement
Validate with people who use this workflow before building.
Hypothesis 3
Incorporate video tutorials for each trick shot.
Assumption to check: Lack of tutorials or instructional videos
Validate with people who use this workflow before building.
Hypothesis 4
Provide clearer explanations of what premium features include.
Assumption to check: In-app purchase limitations not clear
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
Understand (and try!) competition level pool trick shots with 120 pool table diagrams and descriptions. Adapted from the WPA artistic pool shot program, these are the OFFICIAL trick shots performed in sanctioned, ranking trick shot tournaments. From the same team that produced the app “Trick Shot Scorekeeper,” we bring you a full pocket-version of the WPA artistic pool trick shot manual. We have redrawn all of the pool table diagrams and included the rules and objectives of each shot for easy browsing. When watching a tournament, you’ll be able to follow along more easily knowing that you’re looking at same instructions the pros are following. NOTE: You can download the official PDF for FREE from the WPA-APD (World Pool-Billiards Association’s Artistic Pool Division) website. Features: - 120 complete FULLSCREEN pool table diagrams with annotations - organized into 8 disciplines: Trick & Fancy, Special Arts, Draw, Follow, Bank & Kick, Stroke, Jump, and Masse - trick shot rules describe the number of points, set up, and objective for each individual shot - easy navigation. Swipe left/right to browse the pool table diagrams. Swipe up/down to show or hide the rules for that trick shot **** Developed with Tim “The Dragon” Chin **** For more detailed instructional material, please visit www.trickshottim.com, the website of professional trick shot artist Tim “The Dragon” Chin. He is a consultant on this app and is dedicated to teaching trick shots. You can sign up for a weekly trick shot tutorial newsletter on his website or drop him a message at [email protected].
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
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react-navigation
Zustand
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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.
