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
Balatro
Welcome to the official Balatro mobile game!
$9.99 · In-app purchases
OVERALL US RANK
#10
Paid · all categories
REVENUE (Est)
$795K/mo
$472K - $1.1M
RATING
★ 5.0
106,586 ratings · Top 5%
Evidence scope: #10 is the current overall US Paid chart position. 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
Make this idea yours
A product spec, screen plans, and build steps for your coding agent.
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Combine features and design from your favorite apps.
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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 Balatro: 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 premium version with ad-free experience.
Assumption to check: In-game ads can disrupt gameplay
Validate with people who use this workflow before building.
Hypothesis 2
Offer more in-game cosmetics through the shop.
Assumption to check: Limited character customization options
Validate with people who use this workflow before building.
Hypothesis 3
Improve matchmaking algorithm for quicker games.
Assumption to check: Long wait times for matchmaking
Validate with people who use this workflow before building.
Hypothesis 4
Add an interactive tutorial to guide beginners.
Assumption to check: Steep learning curve for new players
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
Welcome to the official Balatro mobile game! Hypnotic and endlessly satisfying, Balatro is a magical mix of card games like Solitaire and Poker, that lets you twist the rules in ways never seen before! Your goal is to beat the Boss Blinds by making strong poker hands. Find new Jokers that change the game and create awesome and exciting combos! Win enough chips to beat tricky bosses, and find hidden bonus hands and decks as you play. You’ll need all the help you can get to beat the big boss, win the final challenge, and win the game. Features: * Remastered controls for touch screen devices. * Each run is different: every pick-up, discard and joker can dramatically alter the course of your run. * Multiple game items: discover over 150 Jokers, each with special powers. Use them with different decks,upgrade cards and vouchers to boost your scores. * Different Game modes: Campaign mode and challenge mode for you to play. * Beautiful Pixel Art: Immerse yourself in the CRT fuzz and enjoy detailed, hand-crafted pixel art.
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 Navigation
React Native Reanimated
Axios
Expo AV
Async Storage
BUILD KIT DIFFICULTY
Advanced
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.
