# Corner the Market

> Trading Card Portfolio Tracker

Canonical page: [https://chrome-stats.com/d/id6771091369](https://chrome-stats.com/d/id6771091369)

## Overview

- **ID:** `id6771091369`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Alan Niebuhr
- **Category:** Sports
- **Rating:** 5.00 / 5 (2 ratings)
- **Version:** 1.0.1
- **Last updated:** 2026-05-26
- **First published:** 2026-05-25
- **Size:** 32 MB
- **Data as of:** 2026-09-24
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/corner-the-market/id6771091369)
- **Privacy policy:** [http://alanniebuhr.github.io/privacy-statement](http://alanniebuhr.github.io/privacy-statement)

## Description

Your entire card collection—values, live eBay comps, grading math, trade analysis—organized and in your pocket.

Corner the Market is the all-in-one portfolio tracker for serious trading card collectors. Whether you collect baseball, basketball, Pokémon, or Magic — track what you own, monitor real eBay prices, and make smarter buy, sell, grade, and trade decisions.

MY COLLECTION
Add cards with full details: player, year, brand, card number, parallel, condition, purchase price, and date. Mark cards sold when you flip them. Active and sold cards stay separate, searchable, and sortable.

REAL-TIME EBAY PRICES
Look up any card's current market value using live eBay data. See the full price spread with a chart showing Q1, median, Q3, and individual sale prices — not just the cheapest listing.

WATCHLIST
Track cards you want to buy. Set a target price and see when market prices drop into your range. Monitor live eBay listings without leaving the app.

TOOLS THAT DO THE MATH
· Sale Calculator — real profit after eBay fees, shipping, and cost basis
· Should I Grade This? — compare raw vs. PSA 9 vs. PSA 10 eBay prices before you submit
· Trade Analyzer — see the real market value on both sides of any trade
· Backup & Restore — export and restore your full collection anytime

PORTFOLIO ANALYTICS
Value, total invested, win rate, unrealized and realized gains, ROI by year, brand, and condition, top performers, and a portfolio timeline chart.

SUPPORTS ALL MAJOR CARD TYPES
Baseball · Football · Basketball · Hockey · Soccer · Pokémon · Magic: The Gathering · Yu-Gi-Oh! · and more

## Rankings

- #659,554 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6771091369)