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
Two Player Chess (2P Chess)
Two Player Chess (2P Chess) turns your tablet or phone into a two-player chessboard for two humans to play face-to-face
$3.99 · In-app purchases
PRICE
$3.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 4.6
32 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 should your app do differently? Your note travels with the kit so your coding agent builds around your idea.
What's included17 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 Two Player Chess (2P Chess): map the core Business 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
Implement a matchmaking system for more diverse opponents.
Assumption to check: Limited player matching options
Validate with people who use this workflow before building.
Hypothesis 2
Add options to mute chat or filter messages.
Assumption to check: In-game chat can be cluttered
Validate with people who use this workflow before building.
Hypothesis 3
Include a tutorial mode or tips for beginners.
Assumption to check: No tutorial for new players
Validate with people who use this workflow before building.
Hypothesis 4
Offer a free tier with limited features to attract more users.
Assumption to check: Subscription model may deter users
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
Two Player Chess (2P Chess) turns your tablet or phone into a two-player chessboard for two humans to play face-to-face. One person can also play against the inbuilt AI - multiple AI personalities are included. Improve your chess game by getting hints for the best moves in review mode. You can play offline as no internet connectivity or sign-up is required! In the real world, face-to-face chess works great with 3D pieces however in traditional 2D representations the pieces would be upside down for one player. Symmetrical chess piece designs and other innovations in 2P Chess mean it is now fun and easy for two people to use a tablet or phone to play and/or learn chess. 2P Chess provides an excellent tool for teaching chess as you can use a single tablet or phone device together and see legal moves highlighted. Two Player Chess requires no internet connectivity and no account so you can use all features from anywhere. https://twoplayerchess.com
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
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.
