SpoolFlux vs ReSpool
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpoolFlux
Manage NFC tags for 3D printer filament spools with support for various formats like OpenSpool and TigerTag. Features automatic color detection, temperature presets, and a comprehensive filament library. Integrates with the OpenFilament Database.
- Read/write multiple NFC tag formats
- Automatic color detection via TD1 device
- Customizable temperature presets
- Extensive filament and material library
- Support for multicolor filaments
- Import from OpenFilament Database
- Save, load, and export filament data
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iOS app for reading and writing NFC tags on 3D printer filament spools. Supports OpenSpool, OpenPrintTag, ACE Pro, and TigerTag. Features: - Multiple NFC formats: read and write OpenSpool (ISO 14443), OpenPrintTag (ISO 15693/SLIX2), ACE Pro, TigerTag, and OpenTag3D - TD1 filament scanner: automatic color detection via USB-MIDI (connect the TD1 device using a Lightning/USB-C adapter) - Extruder temperature range (150–420 °C, 5 °C steps) with Min/Max slider - Heated bed temperature range (0–160 °C, optional) - Temperature presets per material - 24 predefined colors, add your own - Multicolor filaments: create multiple colors per filament (e.g., for multicolor spools) - 42 materials (PLA, PETG, ABS, TPU, PEEK, and more), add your own - 21 material variants (Matte, Silk, Rainbow, Glow, Carbon, and more), add your own - 42 predefined filament brands, add your own brands - Optional filament properties: weight (250 g–10 kg), diameter (1.75 / 2.85 mm), Spoolman-compatible spool ID - Filament library: save, load, search filaments, and export/import as a .sftemplate file - OpenFilament Database (OFDB): import filament data from the community database - JSON preview with syntax highlighting
ReSpool
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ReSpool writes the NFC tag that Anycubic ACE 3D printers read to identify filament. Anycubic only sells spools with these tags, so filament from any other brand is invisible to the printer. ReSpool writes a blank NFC sticker with the material, colour and printing temperatures of whatever spool you actually have, and the printer then recognises it like its own. WORKS WITH HOME ASSISTANT Every tag gets a unique spool ID, carried in the SKU. The hass-anycubic_cloud integration reads it from the Anycubic cloud, so Home Assistant can tell two identical reels apart and track how much filament is left on each — every reel keeps its own history. BUILT-IN FILAMENT CATALOGUE A shared catalogue of known filaments ships with the app and works offline. Pick a product and write it straight to a tag, or scan a genuine Anycubic spool to add it for everyone. SAFE BY DESIGN - Only the data pages are ever written; a tag cannot be locked or bricked - Every tag is backed up in full before a single byte is written - Every write is read back and verified byte for byte - Existing data is shown before anything is overwritten WHAT YOU NEED A blank NTAG213 NFC sticker (or larger) and an iPhone with NFC (iPhone 7 or newer). Anycubic's own tags are password-protected at the factory and cannot be rewritten; the app detects this and explains it. Your spool library, tag backups and settings stay on your phone. No accounts, no adverts, no analytics.
Screenshots
Verdict
The clearest difference is iOS requirement: ReSpool at 13.0 against SpoolFlux's 18.6. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | SpoolFlux | ReSpool |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Weekly | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPod — better |
| Requires iOS | 18.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Reimar Metzen | Home Hub Smart Solutions |
In-app purchases
SpoolFlux
No in-app purchases
ReSpool
No in-app purchases









