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 Collect! by Topps
Experience a world where you can collect & trade your favorite MARVEL characters as Topps digital trading cards – from the original comic creations to popular blockbuster films and Disney+ series content! Marvel Colle...
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.3
3,348 ratings · Top 30%
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/
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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 Collect! by Topps: map the core Entertainment 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 advanced trading mechanics and customization.
Assumption to check: Limited card trading options and features
Validate with people who use this workflow before building.
Hypothesis 2
Clearer pricing structure and trial options.
Assumption to check: In-app purchases can be confusing
Validate with people who use this workflow before building.
Hypothesis 3
Optimize image loading and caching.
Assumption to check: Slow loading times for card content
Validate with people who use this workflow before building.
Hypothesis 4
Simplify navigation and enhance visual hierarchy.
Assumption to check: User interface can feel cluttered
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
Experience a world where you can collect & trade your favorite MARVEL characters as Topps digital trading cards – from the original comic creations to popular blockbuster films and Disney+ series content! Marvel Collect brings to life the entertaining and delightful collector experience to rip digital collectible packs every day, trade with Marvel fans around the world, complete card sets to earn rewards and much more. Collects can now also join in-app Challenges for a chance to win Topps Marvel hobby boxes, graded cards, and more as they collect cards from iconic Topps releases like Topps Marvel Comics Cinema Chrome, Topps Brooklyn, Fantastic Four, and more! From Ant-Man to X-Men, the Marvel Comic Universe and Marvel Cinematic Universe is at your fingertips in the Marvel Collect! by Topps digital collectibles app. Marvel Collect: Home of the Hobby • Rip packs of new digital collectibles every day • Claim FREE Topps digital collectibles every day • Claim daily coins to boost pack-opening power • Complete sets to earn unique awards • Connect with fellow Disney collectors • Challenges to win physical Topps Marvel boxes Bring your collection to life! • Trade with Marvel & Topps fans around the world • Combine Marvel cards to craft into rarer ones • Use energy to spin the Wheel for cards & coins • Missions to unlock special Marvel content Track your Topps collecting adventure! • Progress through thematic Marvel Seasons • Collect XP through daily tasks & achievements Customize your Profile! • Showcase your favorite Marvel collectibles • Select your Marvel character profile avatar ----- For the latest Marvel Collect! news: - Twitter/X: @ToppsMarvel - Instagram @toppsdigital - Facebook: @toppsdigital - Newsletter: play.toppsapps.com/app/marvel-collect Collect your favorite characters from across the MCU: Iron Man (2008) The Incredible Hulk (2008) Iron Man 2 (2010) Thor (2011) Captain America: The First Avenger (2011) The Avengers (2012) Iron Man 3 (2013) Thor: The Dark World (2013) Captain America: The Winter Soldier (2014) Guardians of the Galaxy (2014) Avengers: Age of Ultron (2015) Ant-Man (2015) Captain America: Civil War (2016) Doctor Strange (2016) Guardians of the Galaxy Vol. 2 (2017) Spider-Man: Homecoming (2017) Thor: Ragnarok (2017) Black Panther (2018) Avengers: Infinity War (2018) Ant-Man and the Wasp (July 2018) Captain Marvel (March 2019) Avengers: Endgame (April 2019) Spider-Man: Far From Home (June 2019) Black Widow (July 2021) Shang-Chi and The Legend of the Ten Rings (September 2021) Eternals (November 2021) Spider-Man: No Way Home (December 2021) Doctor Strange in the Multiverse of Madness (May 2022) Thor: Love and Thunder (July 2022) Black Panther Wakanda Forever (November 2022) Guardians of the Galaxy Holiday Special (November 2022) Ant-Man and the Wasp: Quantumania (Feb 2023) Guardians of the Galaxy Vol. 3 (May 2023) The Marvels (July 28, 2023) Captain America: New World Order (February 2024) Deadpool & Wolverine (July 2024) Echo (January 2024) Agatha All Along (September 2024) Your Friendly Neighborhood Spider-Man (Jan 2025) Captain America: Brave New World (Feb 2025) Daredevil: Born Again (March 2025) Thunderbolts (May 2025) Ironheart (June 2025) The Fantastic Four: First Steps (July 2025) and the list goes on!
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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
Zustand
react-navigation
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.
