# SpoolSense - NFC Filament Tags — Read, write & track filament > NFC reader/writer for 3D printing filament spools, with optional inventory and printer integration. (iPhone/iPad app by shane jordan.) - Source: https://appshunter.io/ios/app/spoolsense-nfc-filament-tags/id6789256550 (this page in markdown: same URL + `.md`) - Developer: [shane jordan](https://appshunter.io/developer/1894670349) - Category: Utilities - Price: Free - Rating: 5.00/5 from 1 App Store ratings - Age rating: 4+ - Requires: iOS 17.0 · 6 MB - Released: 2026-07-13 - Data updated: 2026-08-24 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/spoolsense-nfc-filament-tags/id6789256550/reviews.md ## What is SpoolSense? SpoolSense turns your iPhone into an NFC reader and writer for 3D-printing filament spools. Tap a tagged spool and SpoolSense instantly shows you what it is: material, brand, color, nozzle and bed temperatures, filament diameter, density, and how much is left on the roll. No typing, no guessing which spool is which. READ AND WRITE FIVE TAG FORMATS - OpenPrintTag (ISO 15693, ICODE SLIX2) - OpenSpool (ISO 14443A, NTAG215/216) - TigerTag (ISO 14443A, NTAG213/215/216) - OpenTag3D (ISO 14443A, NTAG215/216) - NFC+ - register any blank tag's UID against your inventory Write a blank tag from scratch, or read an existing tag and edit it. SpoolSense verifies every write by reading the tag back. WORKS ON ITS OWN Reading and writing tags needs nothing but your iPhone and a tag. No account, no subscription, no server, no cloud. SpoolSense collects no data whatsoever. OPTIONAL: SPOOLMAN INVENTORY Point SpoolSense at a self-hosted Spoolman server and your whole filament inventory syncs to your phone. Browse every spool, search by material or vendor, see remaining weight at a glance, and get a low-spool warning at a threshold you choose. Scans update Spoolman automatically, and used filament is deducted for you. OPTIONAL: SEND TO YOUR PRINTER Scan a spool and push it straight to the printer you just loaded it into: - Snapmaker U1 - assign the spool to a channel over your local network - Klipper with AFC / Happy Hare / a toolchanger - route through SpoolSense middleware for tool assignment and automatic deductions - Plain Klipper - scans keep Spoolman up to date Pick any combination, or none. A phone can roam between printers. PRIVACY Everything lives on your own devices and your own servers. SpoolSense has no analytics, no tracking, no accounts, and no ads, and it never sends your data anywhere. REQUIREMENTS NFC scanning and writing require a physical iPhone (iPhone 7 or later). Spoolman and printer integration are optional and require software you run yourself on your own network. ## Key features - NFC reader and writer for filament spools - Reads material, brand, color, temperatures, and remaining amount - Supports five tag formats (OpenPrintTag, OpenSpool, TigerTag, OpenTag3D, NFC+) - Write blank tags or edit existing ones - Optional Spoolman inventory synchronization - Optional direct sending to compatible 3D printers - No account, subscription, server, or cloud required ## Frequently asked questions about SpoolSense ### What is SpoolSense? SpoolSense is a utility app that turns your iPhone into an NFC reader and writer specifically for 3D printing filament spools. It allows you to quickly read and write information to NFC tags attached to your filament. ### Does SpoolSense have ads? No, SpoolSense is completely ad-free. The developer prioritizes user privacy and experience, ensuring no advertisements interfere with its functionality. ### What devices does SpoolSense support? SpoolSense requires an iPhone 7 or later for its NFC scanning and writing capabilities. The app is designed for iOS devices. ### Is SpoolSense free to use? Yes, SpoolSense is available for free. There are no in-app purchases or subscriptions required to use its core NFC reading and writing features. ### How often is SpoolSense updated? The latest version, 1.1.1, was released on August 21, 2026, indicating recent development activity. Users can expect ongoing support and potential updates. ### What are the optional features of SpoolSense? Optional features include syncing with a self-hosted Spoolman server for inventory management and sending spool data directly to compatible 3D printers like Snapmaker U1 and Klipper-based systems. ### What is the age rating for SpoolSense? SpoolSense has an age rating of 4+, making it suitable for a wide range of users. This indicates no mature content is present in the application. ### How does SpoolSense handle user data and privacy? SpoolSense is designed with a strong focus on privacy. It collects no data, has no analytics, no tracking, no accounts, and never sends your data anywhere, ensuring everything lives on your devices or servers. ## Version history (last 3 releases) ### 1.1.1 — 2026-08-21 Fixed a bug where a colour hex code typed into a tag writer screen — or imported from Spoolman — was quietly changed to a slightly different colour. Your exact colour is now kept. ### 1.1.0 — 2026-07-20 NEW — Update tab: scan a spool, then log what you used or set its new weight. Prefills from your printer's last job or pending middleware usage; verified writes back to OpenPrintTag and OpenTag3D. NEW — Reconciliation: when a tag and Spoolman disagree, a differences chip shows exactly what differs, side by side, and lets you repair the weight in either direction — always previewed, always verified. NEW — Toolchanger staging board: see your whole dock on the Scan tab — Bondtech INDX tools or Happy Hare / ERCF gates, what's loaded where, and which tool is printing. Requires the SpoolSense middleware. IMPROVED — Partial filament deductions are preserved instead of lost, existing manufacturers are reused automatically when creating spools, and the create page closes itself when finished. ### 1.0.0 — 2026-07-13 No release notes. ## Related topics [filament rfid](https://appshunter.io/ios/topics/filament-rfid) · [spoolflux](https://appshunter.io/ios/topics/spoolflux) · [filament swatches](https://appshunter.io/ios/topics/filament-swatches) · [voron](https://appshunter.io/ios/topics/voron) · [tag my spool](https://appshunter.io/ios/topics/tag-my-spool) --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*