What I Already OwnSign in

Records, books, comics and manga

Never buy a duplicate again.

Scan the barcode with your phone before you buy: in seconds, you know whether that record or book is already on your shelves.

Try it freeWatch the video · 25 s
  • Free up to 20 items, then a 7-day trial
  • iPhone and Android
  • No password

Your first 20 items are free, no card needed. Beyond that: 7-day trial at €0, card required, cancel anytime. Your collection stays exportable.

One scan: the exact edition, and whether it is already in your collection.

How it works

Saturday, 11 a.m., in front of a crate of records.

Twenty-five seconds to see the app at work, from the flea market to your living room.

  1. ScanThe barcode of a record, CD, cassette or book. No barcode? Search by title, or by the matrix etched in a record's run-out groove.
  2. Find the exact editionPressing, country, label, year: when one barcode covers several editions, you pick yours.
  3. See what's missingFor every series and every discography, what you already have and what is left to find.

What the app does for you

Fewer duplicates, more finds.

  • Already yours? Know before you pay.

    At a flea market, a bookshop or a record store: the scan answers, even offline.

  • What your series are missing

    Every series, discography and bibliography, with what's left to find.

  • A list for friends and family

    One link, and no more duplicate gifts. No account to create; never your prices, notes or condition.

The What I Already Own icon, on your home screen.

A real app on your phone, no App Store needed.

It installs from your browser in ten seconds, without the App Store or Google Play. It opens full screen, reads barcodes with the camera and works even without a signal.

  • iPhoneOn iPhone: once you're in the app, open Safari's Share menu, then choose “Add to Home Screen”.
  • AndroidOn Android: once you're in the app, tap Install when it offers it, or use the ⋮ menu in Chrome.
  • ComputerOn a computer, it works in the browser: search, sort and export your collection.

The catalogue

An open catalogue of 62 million editions

Built from the open reference sources: MusicBrainz, Discogs, Open Library, the National Library of France and the national libraries of Spain, Japan and Taiwan, completed with Wikidata. Something nobody knows? Add it with a photo: once checked, it joins the shared catalogue.

Sources and licences

Popular series, in order

See all

Browse the catalogue

Discographies

Bibliographies

Pricing

Free up to 20 items. One subscription beyond.

Records, books, comics and manga, on your phone and your computer. Your first 20 items are free, with no card and no time limit. Beyond that, try it free for 7 days: your card is requested at the start, and you pay nothing if you cancel before the trial ends.

Best value · −16%

€39.95 a year

That's €3.32 a month, 16% less than monthly

  • Records, books, comics and manga
  • Phone and computer
  • Sharing link for friends and family
  • Export anytime

€3.95 a month

No commitment, cancel any time

Everything in the yearly plan

Try it free

Frequently asked questions

How much does it cost?

Nothing up to 20 items: scanning, search, sharing and export are free, with no card and no time limit. Beyond 20 items, a 7-day free trial, then €3.95 a month or €39.95 a year, VAT included, for everything: records, books, comics and manga, on your phone and your computer. Your card is requested when the trial starts; cancel before it ends and you pay nothing. What you've catalogued stays yours, exportable at any time.

Is there an app for iPhone and Android?

Yes, and it's a real app for iPhone and Android, with no App Store or Google Play needed: before you even create your account, we show you how to put it on your home screen. Rather wait? It also works in the browser, on a computer or a phone.

What if my record or book is unknown?

You add it yourself, with a photo taken on the spot. Once checked, it joins the shared catalogue, and the next person who scans it will find it.

Where does the data come from?

From open databases maintained by libraries and communities of enthusiasts: MusicBrainz, Discogs, Open Library, the BnF, Wikidata. Their licences and extraction dates are published.

Is my collection private?

Yes. Only you can see it, unless you create a sharing link for people close to you. You can export it as a CSV file or delete your account at any time.

App to catalog your vinylApp to manage your home library

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Never buy a duplicate again.

Free up to 20 items, no card needed. Beyond that, a 7-day free trial, then €3.95 a month or €39.95 a year.

Try it free