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
Diamond Stat Tracker
DiamondStats is the all-in-one baseball statistics app built for players, parents, and coaches who want to track performance where it matters — on the field.
$0.99
PRICE
$0.99
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.
Build your own version
Build Kit
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A product spec, screen plans, and build steps for your coding agent.
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What should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
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/
Preview a sample Build Kit No email needed
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 Diamond Stat Tracker: 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 more detailed analytics and visual charts.
Assumption to check: Limited features for tracking advanced statistics
Validate with people who use this workflow before building.
Hypothesis 2
Enhance UI with modern design trends and animations.
Assumption to check: User interface may not be engaging
Validate with people who use this workflow before building.
Hypothesis 3
Add functionality for managing multiple teams and their stats.
Assumption to check: No support for team management
Validate with people who use this workflow before building.
Hypothesis 4
Include features to share stats on social media.
Assumption to check: Lack of social sharing options
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
DiamondStats is the all-in-one baseball statistics app built for players, parents, and coaches who want to track performance where it matters — on the field. Personal Stat Tracker Log your individual game stats in real time. Track hits, at-bats, home runs, stolen bases, pitching performance, and more. Every game is saved so you can review your progress over time. Hit quality tracking lets you log contact type, trajectory, and spray direction for deeper analysis. Team Stat Tracker Manage your entire roster and log stats for every player during live games. Track batting, pitching, fielding, and baserunning with a simple tap-based interface. See live stat logs update as the game unfolds, with full inning and score tracking. Coaches Corner Review team-wide performance, compare players, and make data-driven decisions for your lineup and rotation. Training Tracker Log practice sessions and drills to track development beyond game day. Key Features Live game logging with real-time stat tracking Auto-calculated stats: batting average, IP from outs, strikeouts, walks Hit quality tracking: contact, trajectory, and spray direction Full team roster management with substitutions Pitching history showing every pitcher's game line Dark-themed game interface designed for outdoor use All data stored locally on your device Whether you're a travel ball parent keeping a book, a high school player building a recruiting profile, or a coach managing a roster — DiamondStats puts the numbers at your fingertips.
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
React Navigation
React Hook Form
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.
