App Overview

MyDex TCG Card Scanner icon

MyDex TCG Card Scanner

Alberto Moral · Reference

MyDex – Trading Card Scanner & Collection Manager

Free · In-app purchases

PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
4.8
6,209 ratings · Top 5%

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/
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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.

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.

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

> SELECT BUILD PLATFORM:

Good fit for mobile-first iOS and Android prototypes with managed app scaffolding.

// RORK SYSTEM PROMPT
Rork plan preview for MyDex TCG Card Scanner: map the core Reference 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 advanced filters like rarity, type, and set.

Assumption to check: Limited filtering options for card collection.

Validate with people who use this workflow before building.

Hypothesis 2

Add sharing functionality to showcase collections.

Assumption to check: No social sharing features.

Validate with people who use this workflow before building.

Hypothesis 3

Create an easy walkthrough for new users.

Assumption to check: Difficult onboarding process.

Validate with people who use this workflow before building.

Hypothesis 4

Implement real-time updates for card prices and availability.

Assumption to check: Inconsistent data updates.

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

MyDex – Trading Card Scanner & Collection Manager What's your collection worth? Point your camera at a card – MyDex identifies it in seconds and shows its market price on the spot. Scan your way through a whole stack, watch the total value climb, then add everything to your collection in one go. Built for collectors: organize your cards, browse expansions, and keep your whole collection up to date. - Fast camera scanner that identifies cards in seconds - 40,000+ cards across multiple catalogs - Your collection’s total value, in your currency - Track the exact variant and how many copies you own - See your completion progress for every expansion - Create custom collections and organize cards your way - Export your collection to CSV - Price history charts and market data - Smart search, filters, and expansion browsing Whether you're checking a recent pull, organizing binders, or watching your collection's value grow, MyDex keeps everything in one place. ------------- Disclaimer: MyDex is an independent, unofficial app for collectors. MyDex is not affiliated with, endorsed by, sponsored by, or associated with any official brand, publisher, manufacturer, marketplace, or rights holder. All trademarks, card names, character names, images, logos, set names, and related materials are the property of their respective owners. References to third-party materials are used solely to identify cards and help users manage their personal collections. Market prices and collection values are provided for informational purposes only and may vary by source, condition, currency, availability, and market changes. ------------- Terms: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

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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
React Navigation
Zustand
React Native Reanimated
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.