How to catalogue a trading card collection

Why a notes app or spreadsheet stops working

A handful of cards is easy to remember. A few hundred is not. Once a collection grows, three problems show up: you buy a card you already own, you lose track of what a set is worth, and you can't quickly find a specific card among the rest. A note on your phone or a spreadsheet handles the first fifty cards and then quietly falls behind.

A proper inventory fixes this by keeping a photo, the details, and the value of every card in one place you can search and filter.

Add cards fast with AI scanning

Typing out every card is the slow part, and it's why most collections never get fully catalogued. additem.to can read a card from a photo instead. Point your iPhone camera at it, and the AI suggests the name, a category like Collectible Card, a short description, and tags such as the card's type and rarity. You review what it found in the normal item form and save - nothing is added without your say-so.

Scan a Snubbull and it comes back named, categorised, and tagged Psychic, Basic, and Common, ready to save. The free tier includes 5 AI scans to try the feature; Pro Local includes 40 a month and Pro Cloud 200 a month. For a full walkthrough, see the AI item scanning guide.

Tag by set, rarity, and type

Tags are how you slice a large collection. Set up tags for the things you actually search by - rarity (Common, Rare, Holo, Reverse Holo, Full Art), the card's type or team, the set name, and status tags like Duplicate or For Trade. Every card can carry several, and you can then filter the list to, say, every Holo you own, or everything marked for trade.

The free tier includes up to 25 tags per inventory, which is plenty for a rarity-and-type system; Pro removes the limit if you want a tag per set.

Track condition and value with custom fields

The built-in fields cover the basics, but a card collection has its own details worth recording. Custom fields let you add exactly what you track: grade, set number, purchase price, and market value. Fill them in per card and you have a record you can total up, insure, or sell from.

When you need to share or prove what the collection holds, export it to a PDF report or CSV. That is the same record an insurer or a buyer will want to see.

Keep each collection in its own inventory

You are not limited to a single list. Create a separate inventory for each collection - Pokémon in one, sports cards in another, LEGO or coins in their own - so different sets never get mixed together and each stays easy to browse on its own. The free tier includes one inventory to start with; Pro Local and Pro Cloud include unlimited inventories, which is what you want once you collect more than one thing.

Photograph every card

A photo does two jobs. It proves the condition of the card at the time you logged it, which matters for insurance and resale, and it makes the collection far quicker to browse - you recognise a card by its picture long before you read its name. A clear, well-lit photo of the front is enough for most cards; add the back as a second photo for anything valuable.

Find duplicates and gaps

Once cards are tagged and photographed, the collection answers questions you couldn't ask before. Search a name before you buy to check you don't already own it. Filter by a set to see how close you are to completing it. Tag the spares Duplicate or For Trade so you can pull up your trade pile in seconds at the next meetup.

It works offline, with no account

Cataloguing happens wherever your cards are - at a table, on the floor, at a card shop or a show, often with no signal. additem.to stores everything on your iPhone and works fully offline, with no account needed to start. If you want your collection backed up and synced across devices or open in a web browser, Pro Cloud adds that, but the core app never depends on it.