Every collection
deserves a catalog.

You spent years — and thousands of dollars — building your collection. You deserve to know what it's actually worth. Not a guess. Real sold prices, from real buyers, for real items in your condition.

Other apps charge monthly forever and keep your data hostage in the cloud. Marrow runs entirely on your machine — scan with your phone, manage on your desktop, export whenever you want. No account. No subscription. No cloud. No nonsense.

When you finally scan everything in, most collectors are shocked. Their collection is worth 2–3× what they thought. The insurance PDF takes one click.