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
Topps® BUNT® MLB Card Trader
Topps® BUNT® MLB Card Trader is the officially licensed digital collectibles app of Major League Baseball and MLB Players, Inc! Join a passionate community of baseball fans from around the world that enjoy collecting ...
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.5
7,382 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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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/
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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 Topps® BUNT® MLB Card Trader: map the core Sports 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 feature for users to customize their cards with personal images or text.
Assumption to check: Limited card customization options
Validate with people who use this workflow before building.
Hypothesis 2
Optimize image loading and caching strategies.
Assumption to check: Slow loading times during peak usage
Validate with people who use this workflow before building.
Hypothesis 3
Add social sharing options and community features.
Assumption to check: Limited social features for sharing cards
Validate with people who use this workflow before building.
Hypothesis 4
Simplify onboarding and navigation flows.
Assumption to check: Complex navigation for new users
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
Topps® BUNT® MLB Card Trader is the officially licensed digital collectibles app of Major League Baseball and MLB Players, Inc! Join a passionate community of baseball fans from around the world that enjoy collecting & trading Topps baseball cards, bringing their collections to life with fun, interactive in-app features! Set lineups using Topps baseball cards in your collection that score in real-time! Topps BUNT is the premiere trading card destination to collect favorite players, iconic moments, original art, classic Topps designs and more – all from your mobile device. Topps BUNT MLB Card Trader offers the perfect orientation for collectors of all experiences and skill levels, offering a chance to connect and trade with baseball fans around the world, combine cards to craft into rarer ones, rip digital packs for chances to win physical Topps Baseball hobby product including hobby boxes, full cases, high-value graded cards and more! Exciting world of baseball card collecting! • Rip packs of MLB digital trading cards daily • Claim FREE daily bonus cards & coins • Trade with baseball fans around the world • Complete events for exclusive Topps MLB cards • Join Seasons to complete in-app collector journeys • Connect with Topps baseball card collectors Bring your Topps card collection to life! • Complete Missions to unlock unique content • Play your Topps cards in Contests to win prizes • Combine cards to craft into rarer ones • Track & complete sets to earn collectable awards • Win physical Topps hobby boxes via Challenges • Spin the Wheel to win cards and coins Customize your Topps profile! • Showcase your favorite Topps MLB baseball cards • Choose & earn new MLB profile avatars *For the best experience, we recommend devices be updated to iOS 15 or later.* ----- MORE INFO: For the latest Topps BUNT MLB news: - Twitter: @ToppsBUNT - Instagram @ToppsDigital - Facebook: @ToppsDigital - Newsletter: play.toppsapps.com/app/bunt Collect your favorite baseball player cards from all 30 MLB teams: Arizona Diamondbacks Atlanta Braves Baltimore Orioles Boston Red Sox Chicago White Sox Chicago Cubs Cincinnati Reds Cleveland Guardians Colorado Rockies Detroit Tigers Houston Astros Kansas City Royals Los Angeles Angels Los Angeles Dodgers Miami Marlins Milwaukee Brewers Minnesota Twins New York Yankees New York Mets Oakland Athletics Philadelphia Phillies Pittsburgh Pirates San Diego Padres San Francisco Giants Seattle Mariners St. Louis Cardinals Tampa Bay Rays Texas Rangers Toronto Blue Jays Washington Nationals + World Baseball Classic cards! Link to the EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
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
Zustand
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.
