The collection app for Mac

Built for a long cataloguing session at a desk

Getting a collection into an app is the slow part, and it's the part a Mac is best at. Sit down with a box of coins or a crate of records and work through it with a full-size screen, a keyboard and a trackpad or mouse, instead of thumbing through entries on a phone. Classifier for Mac runs on macOS 15.6 and later, and everything you add there follows you to your iPhone and iPad.

Keyboard shortcuts for the things you do most

When you're adding a whole box of items, keeping your hands on the keyboard saves a surprising amount of time.

• ⌘N Adds a new collection from your list of collections, or a new item when you're inside one.
• ⌘F Searches the collection you're in. Type a few words and Classifier shows the items whose fields contain all of them, so “1974 Ontario” finds that one plate without scrolling.
• ⌘, Opens Settings, the same as in any other Mac app.

Drag photos in straight from Finder

If you've already scanned your stamps or photographed your cards with a proper camera, there's no need to move the files into Photos first. Drag an image from Finder onto an item's add-photo button and it's attached, or drop one on a collection's cover to replace it. Clicking the add-photo button instead opens a file picker, so you can choose an image from any folder on your Mac.

Drag things into the order you want

Dragging works for sorting too. Drag an item's photos to change their order, drag a collection's fields into the order that suits what you collect, and drag your pinned charts around the statistics screen until the ones you check most are at the top.

The same collection on every device

Classifier uses iCloud sync, so a Mac is not a separate copy of your collection — it is the same collection. Add items on your Mac and they appear on your iPhone and iPad without exports, imports, or a separate account to set up. Catalog at home, then check the wishlist from your pocket at a show.

Tags and filters that match how you sort

Rather than locking you into fields somebody else picked, Classifier lets you build your own tags — condition, era, origin, value, or whatever actually matters for what you collect — and then filter down to exactly the items you want. On a Mac screen, filtering a large collection is genuinely quick.

See what your collection adds up to

Classifier turns your items into charts and statistics: totals by category, how many items carry each tag, estimated value over time, and the trends that are impossible to see when your collection lives in a spreadsheet or a shoebox.

Common questions

Also on iPhone and iPad

One free download covers every platform. See Classifier for iPhone, Classifier for iPad, or read more about what Classifier does.