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
Collectr - TCG Collector App
Why use multiple apps when you can track all your TCGs in one place? Most collectors collect multiple TCGs
Free · In-app purchases
PRICE
Free
In-app purchases
BUSINESS MODEL
Freemium
No overall Grossing estimate available
RATING
★ 4.9
65,261 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 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 Collectr - TCG Collector App: 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
Improve scanning functionality with better image recognition.
Assumption to check: Limited card scanning accuracy
Validate with people who use this workflow before building.
Hypothesis 2
Implement a guided onboarding process.
Assumption to check: Difficult navigation for new users
Validate with people who use this workflow before building.
Hypothesis 3
Provide real-time updates on card values.
Assumption to check: Inconsistent value tracking
Validate with people who use this workflow before building.
Hypothesis 4
Add community features such as trading and forums.
Assumption to check: Lack of social features
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
Why use multiple apps when you can track all your TCGs in one place? Most collectors collect multiple TCGs. Whether you are a Pokemon collector, Magic collector, YuGiOh collector, MetaZoo collector, or even a Funko collector, this app is for you! Collectr is a next-generation portfolio manager. We allow you to manage, track and value all your raw, graded and sealed cards in the palm of your hand. It’s never been easier to view your TCG collections as a portfolio. Leverage our real-time database of 200,000+ products to instantly value your products. We have data available for the following TCGs: - Magic The Gathering - Yu-Gi-Oh! - Pokémon - Vanguard - Force of Will - Weiss Schwarz - Final Fantasy - Star Wars Destiny - Dragon Ball Super - Funko - Transformers - Flesh and Blood - Digimon - Gate Ruler - MetaZoo KEY FEATURES - Build Your Collection - Search and add products from our 200,000+ product catalog - Value Your Portfolio - Instantly understand and track the value of your collections - Track Market Trends - Gain real-time insights into the performance of your collection - Multi-Currency Support - Know the value of your collection in any currency (including crypto!) - Biggest Gains/Losses - Understand the biggest movers in your portfolio in real-time ADDITIONAL FEATURES THAT REQUIRE IN-APP PURCHASE - Unlimited Card Scanning - Exclusive Filters - Data Exports - Social Custom Backgrounds Download our app today and start managing your collection in the most advanced and efficient way possible! --- More about Collectr: Terms and Conditions: https://getcollectr.com/terms-and-conditions.html Privacy Policy: https://getcollectr.com/privacy-policy.html E-mail: [email protected] Instagram: www.instagram.com/getcollectr Join our discord to chat with us and other like-minded collectors! The link is on our Instagram
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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
expo-router
@supabase/supabase-js
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.
