
Collectr
TCG-Completist
Haki TCG
Poke EV
Pokémon TCG Online
Card Pilot
TCG Sync
Scan, value and build decks for 10 TCGs — Pokémon, Magic, One Piece, Yu-Gi-Oh! and more, in one AI-powered collection app.

Pandas
NumPy
Seaborn
D3.js
Plotly
GnuPlot
Jupyter
matplotlib is a python 2D plotting library which produces publication quality figures in a variety...
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Based on our record, Matplotlib seems to be more popular. It has been mentioned 114 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | tcgjoin.com | matplotlib.org |
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| Platforms | — | |
| Company | Startup from Spain · 1 - 9 employees | — |
| Listed in |
In their own words, as submitted to SaaSHub.


TCGJoin is an all-in-one platform for trading card game collectors. Scan your cards with the camera, get an up-to-date value for your collection, track set completion and build decks with AI — across 10 games from a single account. Supported games: Pokémon, Magic: The Gathering, One Piece Card...
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Learn Matplotlib in 6 minutes | Matplotlib Python Tutorial
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As answered by people managing TCGJoin and Matplotlib.
TCGJoin's answer
Two overlapping groups.
The core audience is collectors who have accumulated more cards than they can track by memory typically returning players who came back to Pokémon or Magic as adults, plus long-time collectors finishing sets. They want to know what they own, what it's worth, and what's missing. Mostly 20–45, Europe first (Spain and the UK are the strongest markets today), with the app published in 8 languages.
The second group is competitive and casual players who use the deck builder to test lists against what's already in their binder before spending money.
Local game stores sit alongside both: they use TCGJoin as a reference their customers can trust, rather than as a sales channel.
TCGJoin's answer
Most card apps are built around a single game. TCGJoin is built around the collector. One account covers 10 trading card games Pokémon, Magic: The Gathering, One Piece, Yu-Gi-Oh!, Lorcana, Dragon Ball, Digimon, Naruto Kayou, Riftbound and football stickers so your whole collection lives in one place instead of five separate apps.
The AI scanner does the heavy part: point your camera at a card and it identifies not just the card but the exact variant set, language, edition, holo treatment which is where most of the value difference actually sits. From there you get live valuation, set completion progress, and an AI deck builder that checks your list against the current format rules using cards you already own.
Everything is available in 8 languages, and prices are shown openly rather than hidden behind a listing.
TCGJoin's answer
Three reasons.
It's collection-first, not marketplace-first. Many tools exist to sell you cards, so the price you see is the price someone wants you to pay. TCGJoin starts from what you own and what it's actually worth you can use it for years without buying or selling anything.
Variant-level accuracy. Knowing you own "a Charizard" is useless. Knowing which print, which language, which edition is the entire difference between a €3 card and a €300 one. That's what the scanner is built to resolve.
One app instead of five. If you play or collect more than one game and most people do now you stop juggling a Pokémon app, a Magic app and a spreadsheet.
TCGJoin's answer
TCGJoin started from a pretty ordinary frustration: card prices are opaque, and that opacity is profitable for everyone except the collector. Values swing on hype, listings are inconsistent, and a beginner has no realistic way to tell whether the card in their hand is worth €2 or €200 which is exactly the gap speculation lives in.
The first version was a scanner built to answer one question honestly: what is this card, precisely, and what is it worth right now? Collectors kept asking for the next game, and the next, until it made more sense to build one platform covering every major TCG than to keep building separate apps.
The goal hasn't changed: give collectors the same information the people setting the prices already have.
TCGJoin's answer
The backend runs on NestJS with TypeScript, following a clean architecture with CQRS, backed by a relational database holding the full card catalogue sets, variants and pricing history across all supported games. The frontend is React with TypeScript, server-rendered for SEO across the 8 published locales. Card recognition uses computer vision models for detection and matching, with a variant-resolution layer on top. Everything runs on cloud infrastructure with automated CI/CD and monitoring.
TCGJoin's answer
Spanish TCG gamers
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Matplotlib is a widely used tool for data visualization in Python. It provides an object-oriented API for embedding plots into applications.
You can use this library for multiple purposes such as generating plots, bar charts, histograms, power spectra, stemplots, pie charts, and more. The best thing about Matplotlib is you just have to write a few lines of...
Matplotlib is an open source Python plotting library that's used to read, import and visualize data in analytics applications. Data scientists and other users can create static, animated and interactive data...
Recommendations tracked on public social media and blogs since March 2021.


Tracking TCGJoin since Sep 2026.
In February, an AI agent named MJ Rathbun submitted a pull request to matplotlib — the Python plotting library used by half the scientific computing world. Scott Shambaugh, a volunteer maintainer, rejected it. Standard code review.... - Source: dev.to / 8 months ago
Numbers are useful, but sometimes it’s easier to spot patterns when you can actually see your data. Pandas works seamlessly with Matplotlib, a popular Python library for creating visualizations. Together, they make it easy to turn raw... - Source: dev.to / 11 months ago
We are storing the results in JSON files, which we combine, analyze and visualize using matplotlib in Python. Here's the structure of a benchmark result file:. - Source: dev.to / 12 months ago
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