A spool inventory that weighs itself. Purpose-built hardware, a community filament catalog, printer integrations, and real cost tracking — for people who print enough to lose track.
A scale that recognizes the spool sitting on it, then logs the weight for you.
The Inspector reads the spool's RFID tag or scans its QR code, waits for the weight to settle, works out how much filament you've used, and files it — all before you've put the lid back on the dry box. No phone, no typing, no forgetting.
Weigh a spool, enroll a new one, set its storage location, run a drying session, or use it as a plain kitchen scale.
Bambu and ELEGOO reels carry RFID tags from the factory. On RFID-equipped units the Inspector reads them directly — including Bambu's encrypted tags.
Blank tag, or a refill spool that never had one? Queue the spool from the web, hold the tag to the Inspector, and it writes that spool's details onto it.
Bambu and ELEGOO reels carry a tag on each hub, with different UIDs. Enrolling a new spool prompts you to flip it so both are on file — then either side identifies it.
Lost a spool in the pile? Wave the reader and it tells you when you've found the right one.
Weighings queue up on the device and send themselves the moment the network comes back. Nothing is lost.
Pick the shelf, bin, or dryer right on the device. Your location list syncs down automatically when it changes.
New firmware is offered on the device and installs over WiFi when you say so. Never pushed behind your back.
Flash it, join it to WiFi through a captive portal, and tune the camera, scan light, and buzzer from a web page it serves itself.
Order the PCB set, print the parts, and work through a ten-phase build guide with a full bill of materials and photos for every step. Or buy one assembled — the firmware and the app treat both the same.
However the spool arrived, there's a way to get it on the books in seconds.
Snap the label or the box. Brand, material, color, density, and recommended bed and nozzle temps fill themselves in.
AIRead the tag the manufacturer already put on the reel, or pair a blank tag to a spool you own — no label required.
No Inspector to hand? Hold a tag to an Android phone in Chrome and it links to the spool. Browser tag reading is Chrome-on-Android only — iPhones can't do it.
Read a tag back to see which spool it points at and what's stored on it — for when you're holding an unlabelled reel and want to know before you weigh it.
Point the camera at the UPC and we look it up against the catalog.
Choose a brand and color; diameter, density, temps, drying schedule, and empty-spool weight come along with it.
Import your existing inventory from CSV. Free on every plan
Unboxing ten spools? Add them as a batch and the app tracks which ones still need weighing.
Group, sort, and search your collection the way it's actually organized.
By brand, by material, by color, by variant, by shelf — or the full brand → material → variant → color tree. Collapse what you don't need. The view remembers itself between visits.
A full log of every weighing — per spool and across the whole collection — with what changed, when, and whether it came from a device, a print, or your own hand.
Your whole collection as swatches. The fastest way to answer “do I own something close to this?”
Shelves, bins, dry boxes, dryers. Print a QR for each one, reorder them to match the room, and scan to file a spool away.
Tell it how many grams the job needs and it finds the spools that can cover it.
Alerts you when a filament is running out — but stays quiet if you've got another spool of the same thing in the cupboard.
Flags spools with weights that don't add up, missing tare values, or a spool with only one of its two tags recorded (Bambu,Elegoo,etc)
Tare weights per brand and spool version, contributed and corrected by the community, so remaining filament is right.
Publish a read-only link to your inventory or your color wall. Handy for club swaps and “what do you have in orange?”
What the printer knows, the inventory knows.
Connect your Bambu Cloud account and see every AMS unit and slot on the dashboard — what's loaded, how full it is, and the chamber humidity. Match slots to the spools in your inventory once, and print history links back to the filament each job actually used.
Drive a chamber heater through the Panda Gateway, set a timer, and get an email when it hits temperature.
Drop in a 3MF or G-code file and the estimated filament, per-material, comes across with it.
Compare what the slicer predicted against what the scale measured, so you learn how far off your profiles run.
Register each machine with its electricity draw and depreciation so job costs reflect the printer, not just the plastic.
When you log a print, the spool already sitting in the matched AMS slot is selected for you.
Per project, per iteration, per gram — the numbers you need to price work.
Version three of a part costs a different amount than version one. Track each attempt separately instead of averaging the failures away.
Before you start, check whether the spools you've got can finish the project.
Weighings that happened during a project get offered up for attribution, so you're not reconciling by memory.
Where the money and the grams went, by material, by project, over any window.
ProHow fast a spool is going and roughly when it'll run out — smoothed, so one big Saturday print doesn't skew it.
Live exchange rates and region detection, so costs read in the money you actually spend.
The physical half — getting the system onto the spools themselves.
Niimbot and Phomemo print over Bluetooth straight from the browser — no desktop software in the middle. Chrome, Edge or Brave on desktop, or Chrome on Android; Apple blocks Bluetooth printing in every iOS browser. DYMO prints through DYMO Connect on your computer.
Lay labels out on Avery 5160, OL5225, or OL742WR sheets as a PDF.
Choose which fields print and how they're styled. Your spools, your layout.
Print swatches for a filament sample holder, correctly rotated for the mount.
Generate a sheet of codes, stick them on, then claim each one to a spool as you go.
Start a dry from the app or the device, track how long it ran, and see how much moisture weight came off.
Every entry contributed, reviewed, and corrected by people who print.
Brand variants with diameter, density, recommended temperatures, drying schedules, and empty-spool weights on file. Missing something? Submit it. Spotted a wrong color or temp? Suggest the fix. Both go through review and land for everyone.
Categories, threads, voting, and moderation. Where features get requested before they get built.
A public list of what people want next. Vote, comment, and watch things ship.
Price drops on filament you actually buy, with an optional daily digest tuned to the brands and materials you use.
An optional email recap: what you used, what's running low, what needs attention.
Guides for every integration, plus a chat assistant 24/7.
A real API, real webhooks, and an export button that works.
Nine endpoints covering spools, locations, materials, colors, usage, and projects.
ProGet pinged when a spool is created or its weight changes. Signed, with delivery history and automatic retries.
ProCSV of your spools, or a full JSON backup of the whole account. No lock-in.
ProWhich key called what and how often.
The details you only notice when they're missing.
You're standing at a shelf with a spool in one hand. Every screen is designed for that, not for a desk.
TOTP with any authenticator app.
For the garage at midnight.
In-app alerts and opt-in email. Every message has an unsubscribe link that works.
Filters, sorts, and grouping stay put between sessions.
A short note when something ships, so you find out from us and not by accident.
No spool limit. No location limit. No credit card.
For selling prints, running a farm, or building on top.
Own a Spool Inspector? Reports and a raised scan allowance are yours permanently, free — and the code in the box adds Pro months on top.
Every feature here started as somebody's forum post. The API is documented. Start free with the spools you already own — the scale can come later or not at all.
The app is free to start. Add a Spool Inspector later if you want gram-accurate logging without touching a keyboard.