Get Spool The filament inventory app
Spool is the offline inventory app for your 3D printing filament.
Track your rolls, colors, locations, and remaining filament in one place.
Native Mac app · Windows preview · Works offline
FAMILIAR BRANDS. ONE ORGANIZED SHELF.
Your favorites are already in the catalog. Your custom filaments belong here, too.
A place for every roll
From the unopened box to the last few grams,
keep the little details together.
Separate opened rolls from sealed stock. See remaining filament, spot low rolls, and add a whole pack in one go.
Create locations once. Assign a shelf, dry box, or drawer when you add your next roll.
Track price per roll and your collection’s full purchase value, in your preferred currency.
Pick it. Don’t type it.
Choose a brand, filament type, and color from the built-in catalog. Go beyond PLA with PETG, ABS, ASA, TPU, and more. Set default prices and locations by brand and filament type.
Catalog options vary by brand. Custom entries are always available.
Fits the way you work
Start with the keyboard. Add a photo, scale, or reader when it suits you.
Photograph your filament labels and let Spool suggest catalog matches. Review the colors and quantities, then add the batch to your inventory.
Photo recognition runs on your device. On Mac, you can also capture with a compatible iPhone using Continuity Camera.
Keep it simpleAdd rolls manually. No extra hardware needed.
Bring your spreadsheetDownload a CSV template and import in bulk.
Make your own tagsWrite Spool tags to supported blank NFC tags.
Your collection stays yours
Your inventory and photo recognition work locally.
No account needed to use the app. No cloud required.
Move your collection between Mac and Windows with an inventory backup. Keep a copy somewhere safe.
Meet your new shelf companion
Choose your computer. Give every spool a home.
Native, simple, and right at home on your Mac.
Download for MacmacOS 14 or later · Apple Silicon · 6.8 MB
Installation notes ↗Your filament collection, on your Windows PC.
Windows 10 (1809+) / 11 · x64 · 73.6 MB
Preview & installation notes ↗Current builds are unsigned / not notarized, so your system may show an installer warning. The Windows preview still needs testing on Windows hardware. Read the installation notes before installing.
A few good questions
So you know what to expect.
No. You can add filament manually, choose from the catalog, import a CSV, or use a photo. USB scales and NFC readers are optional ways to speed up your workflow.
Spool reads visible text on filament labels and suggests catalog matches. You review the type, color, and quantity before anything is added. Clear, well-lit labels work best. A photo cannot tell how much filament is left on a roll.
Spool supports compatible DYMO USB HID scales and PC/SC NFC readers, including the ACR122U. Manufacturer tag support includes supported Bambu Lab, Snapmaker, and Creality tag formats; compatibility depends on the reader and tag. Create your own Spool tags with supported blank NTAG213, NTAG215, or NTAG216 tags. These are inventory tags, not replacements for a printer’s authenticated manufacturer tags.
Not yet. Log usage in Spool or weigh a roll to update its remaining filament. An NFC tag identifies a spool, but it does not universally provide its current remaining weight.
Yes. Export an inventory backup and restore it in the other version. This is a manual transfer, not automatic cloud sync. Back up your existing inventory before restoring another file.
On your computer. Inventory management and photo recognition run locally, without a cloud account. Use the app’s backup export to keep a separate copy of your collection.