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
PinTrack
PinTrack revolutionizes how you track and analyze your bowling performance with modern features and functionality
$4.99 · In-app purchases
PRICE
$4.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 5.0
3 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 included16 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 PinTrack: 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 social features and community challenges.
Assumption to check: Limited user engagement features, such as community or social sharing.
Validate with people who use this workflow before building.
Hypothesis 2
Add detailed analytics and performance tracking.
Assumption to check: No workout metrics or performance tracking for users.
Validate with people who use this workflow before building.
Hypothesis 3
Allow users to create and customize their own activities.
Assumption to check: Limited customization options for activities and sessions.
Validate with people who use this workflow before building.
Hypothesis 4
Provide more diverse subscription models and exclusive content.
Assumption to check: Subscription options may not be compelling enough.
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
PinTrack revolutionizes how you track and analyze your bowling performance with modern features and functionality. Whether you're a league bowler striving for perfection or someone who enjoys weekend games with friends, PinTrack delivers professional-grade scoring and analytics right in your pocket. The app features intelligent pin detection where you simply tap the pins you knocked down on our realistic pin deck visualization. Complete game tracking records every detail including which bowling ball you used for each session, while tracking strikes, spares, and all bowling scenarios with real-time score updates that give you a comprehensive view of your performance and equipment effectiveness. PinTrack ensures your games are automatically saved so you never lose your progress. Share your achievements by exporting scorecards, and enjoy complete functionality even without an internet connection. You can also import and export your complete game data for backup or transfer between devices. Everything remains private on your device with no accounts needed and no personal data collection, making it ideal for league bowlers, tournament players, and casual players who are looking to turn every game into valuable performance insights. For any issues or bugs, email [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
Supabase
Zustand
React Navigation
React Native Date Picker
BUILD KIT DIFFICULTY
Starter
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.
