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
Spades - Classic Cards
Join the Ultimate Card Playing Community and Experience Spades Like Never Before!
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
64,429 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 included18 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 Spades - Classic Cards: map the core Games 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 faster matchmaking algorithm.
Assumption to check: Players may experience long wait times for matchmaking.
Validate with people who use this workflow before building.
Hypothesis 2
Offer an ad-free premium experience.
Assumption to check: Ads can interrupt gameplay.
Validate with people who use this workflow before building.
Hypothesis 3
Add more game modes and customizations.
Assumption to check: Limited game modes can reduce replayability.
Validate with people who use this workflow before building.
Hypothesis 4
Implement skill-based matchmaking.
Assumption to check: Inconsistent player skill levels can lead to frustration.
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
Join the Ultimate Card Playing Community and Experience Spades Like Never Before! Step into the world of Spades! Spades offers an unparalleled experience, bringing you the classic card game with modern twists and exciting game modes. Whether you're a seasoned player or a beginner, there's something for everyone! Amazing Graphics and Smooth Gameplay Enjoy stunning graphics and crisp card animations that make classic card games a visual treat. Our intuitive interface and seamless gameplay ensure you have the best Spades experience on your mobile device. Each playing cards deck has been beautifully designed to give you the best experience possible Features Difficulty Levels: Choose from various difficulty settings to match your expertise. Thrilling classic card games for every mood Unlimited Hints and Undos: Learn and perfect your game with helpful hints and the ability to undo moves. The ultimate way to become one of our Spades masters. Auto-Save: Never lose your progress with our auto-save feature, ensuring you can pick up right where you left off. Why Wait? Join the Spades Revolution Now! Playing cards has been reinvented with Spades. Whether you're here to relax and enjoy a casual game or to compete and become one of our Spades masters, our app has it all. Play Spades your way and elevate your card game experience!
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
Redux
AdMob
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.
