DrySpool: Filament Tracker

DrySpool is a private, offline filament tracker and spool inventory for 3D printing. It tracks every spool you own, predicts when each one needs re-drying, and prints scannable QR labels for your shelves — no account, no cloud, no ads, no subscription. Works with any FDM 3D printer: Bambu Lab, Prusa, Creality, Anycubic and more.

Whether you run PLA, PETG, ABS, ASA, TPU or nylon, DrySpool is the filament dryer log and moisture tracker that shows what's ready to print and what to dry first.

KNOW WHICH SPOOLS ARE DRY
DrySpool models how each spool absorbs moisture over time — every material is different (PLA shrugs off humidity, nylon drinks it), and the estimate factors in how it's stored (sealed with desiccant, open shelf, in an AMS…) and your room humidity, set from any hygrometer. Every spool shows a live moisture reading and when it's due to be re-dried, so you see at a glance what's ready to print and what to dry first.

DRY WITH THE RIGHT SETTINGS
Each material comes with research-backed drying temperatures and times. Start a drying session in any dryer — SUNLU, EIBOS, Creality or a dehydrator — follow the timer, and the spool's moisture resets when it's done.

SCAN AND LABEL EVERYTHING
Generate QR labels for spools and storage locations — print one at a time or 24-to-a-page on A4. The built-in scanner jumps straight to a spool, or moves a whole batch of spools to a new location in a single scan.

TAP-TO-FILL FROM BAMBU LAB RFID
Tap a Bambu Lab spool to your phone's NFC reader and DrySpool decodes the RFID tag to pre-fill material, color, weight and recommended drying temperatures.

IMPORT FROM YOUR SLICER
Drop in a sliced .gcode or .3mf from Bambu Studio, OrcaSlicer, PrusaSlicer or Cura and DrySpool subtracts the filament used — including multi-color prints — from the right spools automatically.

ORGANISE YOUR WORKSHOP
• Inventory with photos, remaining weight, price paid and notes
• Log prints and weigh-ins — usage is recorded per spool and charted over time in Insights (Pro)
• Search and sort your library; browse by colour, location or archive
• Low stock alerts — see what's running low on Home, with reorder reminders (Pro)
• Auto-archive empty spools — kept but out of tracking, and they don't count toward the free limit
• Three home-screen widgets — moisture summary, inventory, and a usage/days-left forecast
• Storage locations (AMS, dryer slots, shelves, custom)
• Per-printer print profiles (printer × material × brand)
• Manage your own materials, brands, dryers and printers
• Works on phones, tablets and Chromebooks — the layout adapts to the bigger screen

YOURS, AND PRIVATE
All your data stays on your device. No accounts, no tracking, no personal data collected. Back up and restore everything — including photos — to a single file whenever you like.

FREE & PRO
DrySpool is free to use — the whole app, for up to 12 spools. DrySpool Pro is a one-time unlock (no subscription, no ads) that adds:
• Unlimited spools
• Smart re-dry reminders — a notification when spools need drying, so you never print wet
• Low-stock reminders — a daily heads-up when a filament is running low, with a shareable reorder list
• Photo gallery — several photos per spool, snap new ones with the in-app camera
• Bulk RFID add — tap Bambu Lab spool after spool to add a whole batch in seconds
• Custom label templates — choose the fields, custom text, font and colours of spool & location labels
• Themes & app icons — premium accent colours and a choice of alternate app icons
• Automatic backups — scheduled .dryspool backups to a folder you choose (OneDrive, Drive or local)
• Insights — filament used, spend and inventory value at a glance, by material and brand
• Cost & inventory-value tracking
• Export your whole library to CSV

Filament inventory, spool tracker, dryer log and moisture tracker for your 3D printer — in one private app.

Built by a one-person studio. Feedback welcome.