SpoolFlux vs SpoolStack
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
SpoolStack
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Never run out of filament mid-print again. SpoolStack is the ultimate inventory manager for 3D printing enthusiasts. Whether you have five spools or five hundred, SpoolStack removes the guesswork from your workshop so you can focus on creating, not stocktaking. EFFORTLESS INVENTORY MANAGEMENT Quick Add — add new spools in seconds with brand and type presets Visual Swatches — colour-coded swatches and Favourites for your go-to materials Smart Thresholds — custom Red and Amber alerts so you know exactly when to reorder On Order Tracking — mark spools as on order with a smart reminder to confirm your order was placed Settings & Support — rate the app, restore purchases, and get in touch directly from within the app SYNCS ACROSS ALL YOUR DEVICES — FREE Your inventory stays up to date everywhere. Add a spool on your iPhone, see it instantly on your iPad or any other iCloud-connected device. Cloud sync is included for every SpoolStack user, no subscription required. REORDER IN SECONDS Auto-Link — SpoolStack automatically matches your filament to reorder links One-Tap Shopping — buy the exact brand and colour you need without searching order histories Broad Support — optimised for Elegoo, Bambu Lab, eSUN, Polymaker, Sunlu, and more GO HANDS-FREE WITH PRO NFC Tagging — tap your phone to an NFC-tagged spool to subtract stock instantly QR Workflow — generate custom labels and scan to update inventory in a flash Unlimited Inventory — remove the 15-spool limit and track your entire collection TAKE CONTROL OF YOUR FILAMENT SpoolStack is free to use for up to 15 spools with cloud sync included. Join the pro makers using SpoolStack Pro to streamline their workflow with unlimited spools and hardware tagging. Privacy Policy: http://bit.ly/3PcUgFE Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: SpoolFlux at none against SpoolStack's 2. SpoolStack's advantage is update cadence (every 2 days vs weekly). On price, ads, device support and iOS requirement 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. SpoolStack sells 2 in-app purchases, starting at $4.99 per month. SpoolFlux asks for nothing beyond the download.
SpoolFlux ships an update weekly, SpoolStack every 2 days. The most recent releases landed on October 5, 2026 and September 26, 2026 respectively.
| Parameter | SpoolFlux | SpoolStack |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (8 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Weekly | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone | iPhone |
| Requires iOS | 18.6 | 17.0 — better |
| Further details — not scored | ||
| Size | 7 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Reimar Metzen | Matthew Howell |
In-app purchases
SpoolFlux
No in-app purchases
SpoolStack
- SpoolStack Pro Monthly$4.991 Month
- SpoolStack Pro Yearly$49.991 Year









