SpoolVault
The filament tracker that knows what's left on every spool
SpoolVault is a filament inventory app for iPhone and iPad, built for 3D printing. Track remaining spool weight to the gram, log usage after every print, and see what each print really costs — no server, no spreadsheet, works with any printer.
Free for up to 10 spools & 1 printer · Premium for unlimited
iOS & iPadOS 18.6+
Preloaded spool weights and color catalogs for Bambu Lab, eSUN, Polymaker, Hatchbox, Overture, Inland, Prusament, Sunlu, Elegoo and more — or add your own brands.
How it works
Three steps between you and never running out mid-print again.
Add your spools
Pick a brand from the preloaded catalog and bulk-add every color at once. Empty spool weights are already filled in for you.
Log each print
After a print, log the grams used per spool — straight from your slicer's estimate or a quick weigh-in. Every spool updates instantly.
Know what's left — and what it cost
See remaining grams on every spool before you hit print, plus the real material cost of every print and project.
What SpoolVault tracks
Every feature exists to answer "can I finish this print, and what will it cost me?"
Accurate spool weight tracking
Brand-specific empty spool weights turn one number from your kitchen scale into exact grams remaining.
Print cost, worked out for you
Add what you paid per spool and every logged print gets a real material cost — no re-typing prices into a calculator.
AMS & multi-material organization
Organize spools by printer, AMS or multi-material slot, and storage location — including third-party filament your AMS can't identify.
Fast inventory setup
Preloaded brands, materials, and colors mean your whole stash is cataloged in minutes, not an evening.
Print Projects
Group multi-plate prints under one project to see total filament used, estimated cost, and a full breakdown per filament.
Search, sort & filter
Find the right spool in seconds by material, color, or remaining weight — active and sealed spools alike.
See it in action
Straight from the app — this is what tracking your filament actually looks like.
Filament tracking guides
Practical answers to the questions every maker hits — whether or not you use SpoolVault.
How much filament is left on my spool?
The weigh-and-subtract method that gives you grams remaining in under a minute — no unspooling, no guessing.
Read the guide →Bambu Lab & AMS filament tracking
Why AMS remaining-filament estimates drift, and how weigh-based tracking gives you exact grams per slot — including third-party spools.
Read the guide →Empty spool weights by brand
Reference table of empty spool weights for Bambu Lab, eSUN, Hatchbox, Overture, Sunlu and more.
See the table →How to track filament usage
Keep a running log of grams used across prints — without OctoPrint, a self-hosted server, or a spreadsheet.
Read the guide →How to organize 3D printer filament
Storage basics plus the digital catalog layer: know what you own, where it lives, and what's running low.
Read the guide →Filament cost per print
The simple math behind print costs — and how to get a real cost on every print automatically.
Read the guide →Spoolman alternative for iOS
An honest comparison: when a self-hosted Spoolman server makes sense, and when a phone app is the better fit.
Read the comparison →Frequently asked questions
Quick answers, with a full guide behind each one.
How do I know how much filament is left on my spool?
Weigh the spool, subtract the empty spool weight for that brand, and what's left is grams of filament. SpoolVault ships preloaded brand-specific spool weights, so you type in one number from the scale and it works out the rest. Learn more
How much does an empty filament spool weigh?
It varies more than you'd think — roughly 120–150 g for cardboard spools and 200–265 g for plastic ones, depending on brand. Learn more
Can SpoolVault track filament in my Bambu Lab AMS?
Yes. Organize spools by AMS slot and track remaining weight from actual weigh-ins — including third-party spools the AMS can't read via RFID. Learn more
How do I track filament usage across prints?
Log each print with the grams used per spool; every spool's remaining weight updates instantly and print history keeps the running log. No server or spreadsheet needed. Learn more
What's the best way to organize 3D printer filament?
Dry storage and labels for the physical side, plus a digital catalog so you always know what you own, where it is, and what's running low. Learn more
How do I work out filament cost per print?
Grams used × price per gram. SpoolVault does it automatically for every logged print, using the actual price you paid for the spool. Learn more
Is there a Spoolman alternative for iPhone?
Yes — SpoolVault covers the spool-tracking core of Spoolman as a native iOS app: no self-hosted server to run, and it works with any printer. Learn more
Is SpoolVault free?
Yes — the free tier tracks up to 10 spools and 1 printer with unlimited print logs, no time limit. SpoolVault Premium ($4.99/month or $49.99/year) unlocks unlimited spools, printers and full weight history.
What devices does SpoolVault run on?
iPhone and iPad on iOS/iPadOS 18.6 or later, plus Apple Silicon Macs. There's no Android version.
Know your filament. Track your costs.
Print with confidence.
Every spool weighed, located and costed — free to download.