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 Contest of Champions
Marvel Contest of Champions is the ultimate arcade fighting RPG game with intense action, powerful combos, epic quests & customization
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.7
720,454 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'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 Contest of Champions: 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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App evidence
Original App Store material. Ratings and screenshots describe the existing app, not proof of demand for your version.
Screenshots
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App Store description
Marvel Contest of Champions is the ultimate arcade fighting RPG game with intense action, powerful combos, epic quests & customization. Collect and battle with over 350 Champions, including your favorite Marvel Super Heroes and Villains like Spider-Man, Thor, Captain America, Magneto, Black Panther, Doctor Doom, Wolverine & more! Step into fast-paced 1v1 combat where skill is everything. Master precise dodges, well-timed blocks, and powerful combo chains as you fight your way through an epic Marvel storyline. Unleash signature Special Attacks from the Avengers like Spider-Man, Iron Man & Black Panther or the X-Men like Magneto, Professor X and Deadpool, and the rest of your favorite Marvel heroes. Assemble your Marvel team and begin your quest to become the ultimate Champion! THE ULTIMATE MARVEL FIGHTING GAME • Dynamic Real-Time Action & Fights – Dodge, block, and chain combos in fast-paced, action-packed Marvel battles with the Avengers, Fantastic Four, X-Men and more! • Signature Special Moves – Unleash powerful Special Attacks that are unique to every Champion and unlock their Signature Abilities such as Spider-Man’s Spider-Sense, Wolverine’s Cellular Regeneration and Doctor Doom’s Indomitable Will. • Strategic Action Fighting Styles – Use class advantages and counters to defeat opponents. OVER 350+ MARVEL HEROES • Spider-Man vs. Deadpool! Captain America vs. Doctor Doom! Black Panther vs. Wolverine! Professor X vs. Magneto! Daredevil vs. Kingpin! The greatest battles in Marvel history are in your hands! • The Collector has summoned you to fight with the biggest Super Heroes & Super Villains from the Avengers, X-Men, Fantastic Four & more! • Experience the ultimate free-to-play action Super Hero fighting game on your mobile device! BUILD, CUSTOMIZE & UPGRADE YOUR ULTIMATE TEAM OF CHAMPIONS: • Epic Marvel Action: Assemble a mighty team of Super Heroes and Villains, including Champions from the Avengers, X-Men, Fantastic Four, Guardians of the Galaxy and more! • RPG Fighting Game: Collect, level up, and manage your teams of heroes and villains wisely to receive synergy bonuses based on their relationship. • Team Customization: Pair up Venom with other Arachnid Hunters such as Vulture or Green Goblin or make a team of Guardians of the Galaxy for a team affiliation bonus. QUEST, FIGHT AND BATTLE: • Journey through an exciting storyline full of action in classic Marvel storytelling fashion from your favorite Super Hero groups like the Avengers, X-Men and Fantastic Four! • Embark on action-packed quests to defeat villains like Kang and Thanos and stop a mysterious cosmic threat from destroying the Marvel Universe. • Fight Marvel heroes and villains across iconic locations like the Avengers Tower, Hell’s Kitchen, Asgard, the S.H.I.E.L.D. Helicarrier, and more. PLAY WITH OTHERS: • Team up with friends and Summoners to build a powerful Alliance! • Test your Alliance’s strength and fight Alliances worldwide in Alliance Wars. • Challenge other Summoners in Battlegrounds for bragging rights! More info: www.playcontestofchampions.com Like us on Facebook: www.facebook.com/MarvelContestofChampions Subscribe on YouTube: www.youtube.com/MarvelChampions Follow us on X: www.x.com/MarvelChampions Follow us on Instagram: www.instagram.com/marvelchampions Follow us on TikTok: www.tiktok.com/@marvelchampions This game includes optional in-game purchases of virtual currency that can be used to acquire virtual in-game items, including a random selection of virtual in-game items. TERMS OF SERVICE: Please read this Terms of Service Agreement and our Privacy Notice before using our services as they govern the relationship between you and Kabam. www.kabam.com/terms-of-service/ www.kabam.com/privacy-notice/
Written user reviews are not shown here. Check current App Store reviews >
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 fairer pricing model with more frequent rewards.
Assumption to check: In-game purchases can be expensive and frustrating.
Validate with people who use this workflow before building.
Hypothesis 2
Introduce more free-to-play champions and events.
Assumption to check: Limited access to champions without spending money.
Validate with people who use this workflow before building.
Hypothesis 3
Provide options for reduced wait times through gameplay.
Assumption to check: Long wait times for energy regeneration.
Validate with people who use this workflow before building.
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-native-reanimated
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.
