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
MARVEL SNAP - Hero Card Game
Welcome to MARVEL SNAP, the Mobile Game of the Year Award Winner, loved by millions of players worldwide
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
133,958 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.
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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Add to a Remix
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 MARVEL SNAP - Hero Card Game: 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
Introduce more unique characters with distinct abilities and varied gameplay strategies.
Assumption to check: Limited character variety with repetitive gameplay
Validate with people who use this workflow before building.
Hypothesis 2
Offer more earnable in-game currency to reduce reliance on IAP.
Assumption to check: Paywall frustration for in-game purchases
Validate with people who use this workflow before building.
Hypothesis 3
Implement a better matchmaking algorithm to reduce wait times.
Assumption to check: Long matchmaking times
Validate with people who use this workflow before building.
Hypothesis 4
Provide a comprehensive onboarding experience with guided tutorials.
Assumption to check: Limited tutorial 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 MARVEL SNAP, the Mobile Game of the Year Award Winner, loved by millions of players worldwide. Build your deck and harness the power of different abilities from MARVEL Super Heroes or Villains, and outsmart your opponent in 3 minutes or less with a winning strategy. This fast-paced CCG has weekly updates and cross-platform play, making the card game easy to pick up but hard to put down, whether you play on PC or mobile. The innovative "SNAP" is a unique mechanic in the game that lets you raise the stakes during a match and apply pressure on your opponent. If you think you have a winning hand, use the 'SNAP' mechanic to double down and potentially double your rewards. Quickly become the master of the multiverse when you download the fast–paced MARVEL SNAP card game! MARVEL SNAP APP FEATURES: PLAY 3-MINUTE GAMES & WIN IN MARVEL SNAP - Every game lasts 3 minutes. We cut the fluff to focus on quick games and pure strategy! - Each player begins with a FREE starter deck that helps you get started on your journey. There are no energy barriers, no ads, and no limits to your play! - Play card games at your own pace, unlock your favorite MARVEL characters, and discover hundreds of new ones as you earn new cards. - “SNAP” mechanic strategy - Apply pressure to your opponents using this innovative feature, and potentially double your rewards. MARVEL CCG WITH VARIETY - This MARVEL-themed card game is designed so that every match feels different. - Play with cards at 50+ different locations from across the MARVEL Universe, each with iconic game-changing abilities. - From Asgard to Wakanda, new locations are introduced regularly to put your creative problem-solving skills to the test. - Weekly updates: Access new cards, new locations, new cosmetics, new season passes, new ranked seasons, new challenges, new missions, and new events regularly. CROSS-PLATFORM PLAY - Available on both mobile AND Desktop PC. - Play anywhere, at any time, when you register your account. - Your progress stays with you across different platforms. BUILD YOUR DECK & COLLECT CARDS - Each card in your deck is a unique character from the MARVEL Multiverse. - Collect, mix, and match hundreds of MARVEL hero and villain art variants from the entire MARVEL Universe—and beyond. You might have a classic comic-inspired Iron Man card, but do you also have the Chibi, 8-bit, and Cartoon variants? I AM GROOT I am Groot. I AM Groot. I am GROOT. I am Groot? I am Groot. I AM GROOT! I am GROOT. I am Groot? DAILY, WEEKLY, & MONTHLY UPDATES MARVEL SNAP stays fresh and exciting with new cards, new locations, new cosmetics, new season passes, new ranked seasons, new challenges, new missions, and new events regularly. You don't have to wait months for updates! What are you waiting for? This strategy CCG game only takes a few minutes to learn and 3-minutes to play. Earn the most power in your location and use a winning strategy to dominate the battle. Download today to see why MARVEL SNAP has won multiple 'Mobile Game of the Year' awards!
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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
Redux
React Navigation
BUILD KIT DIFFICULTY
Expert
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.
