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
Duplicate Bridge Scoring
Duplicate Bridge is fun to play, but totaling up the match points and determining the winner at the end can be difficult
$9.99 · In-app purchases
PRICE
$9.99
In-app purchases
BUSINESS MODEL
Paid
No overall Grossing estimate available
RATING
★ 3.2
24 ratings · Below Average
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 included17 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 Duplicate Bridge Scoring: map the core Productivity 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
Provide user-friendly score input mechanisms with examples.
Assumption to check: Users often find the scoring inputs confusing.
Validate with people who use this workflow before building.
Hypothesis 2
Implement a detailed history view with game summaries.
Assumption to check: The app lacks a robust history feature.
Validate with people who use this workflow before building.
Hypothesis 3
Enhance sharing capabilities to social media and messaging apps.
Assumption to check: Limited options for sharing results.
Validate with people who use this workflow before building.
Hypothesis 4
Streamline navigation and improve the onboarding process.
Assumption to check: Navigation can be clunky.
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
Duplicate Bridge is fun to play, but totaling up the match points and determining the winner at the end can be difficult. That is where the Duplicate Bridge Scoring App can make your life easier. This is an application designed by duplicate bridge players, for duplicate bridge players. Launch the app, start a new match, enter the match parameters, and begin. You can enter the team names if you want, and you can even print out some board movement sheets that can be placed at each table, to help avoid the confusion of where teams move next for each round. If an AirPrint printer is not available, these sheets can be sent out as an email in PDF format, and can then be printed from a desktop computer. Play your game as you would normally, using the "travelers" sheets to keep score of each board. The tournament director can either enter the scores as each board is completed, or can wait until the end. When all the scoring has been entered, the results can be displayed and the winner is determined. The results can also be printed out, or sent out as an email in PDF format. A hand score calculator has also been included.
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
React Navigation
Async Storage
Axios
React Native Paper
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.
