Comparison

SpoolFlux vs SpoolTagWriter

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Read full description

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

About

SpoolTagWriter

Easily read and write NFC tags for 3D printer filament spools using your iPhone. View stored filament data, create new tags with presets or custom settings, and streamline spool management for a faster, cleaner 3D printing workflow.

Highlights
  • Read NFC filament tags
  • View parsed spool data
  • Inspect raw NFC data
  • Write tags with preset profiles
  • Create custom spool settings
  • Streamlined iPhone workflow
Features
Read full description

SpoolTagWriter lets you read and write NFC tags for 3D printer filament spools from your iPhone. Use it to scan existing spool tags, view the stored filament data, and create new tags with either preset profiles or custom settings. The app is designed to make spool setup faster, cleaner, and easier to manage without digging through raw tag values by hand. Features: - Scan compatible NFC filament tags - View parsed spool data including brand, material, color, diameter, weight, and extruder temperature range - Inspect raw NFC page data for supported tags - Write tags using preset filament profiles - Browse presets by brand, material type, and color - Create custom spool settings for your own filament - Choose custom colors visually or by entering a hex value - Write spool data in a streamlined iPhone-first workflow SpoolTagWriter is built for makers who want a simple way to manage filament tag data and prepare spools for supported 3D printing workflows.

Screenshots

SpoolFlux4 screens
SpoolTagWriter4 screens

Verdict

The call

The clearest difference is rating: SpoolFlux at 5.0 against SpoolTagWriter's 1.0. SpoolFlux also leads on ratings volume (8 vs 1) and iOS requirement (18.6 vs 26.2). On price, ads, in-app purchases and monetization model 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

SpoolFlux holds the better App Store score, 5.0 against 1.0. That said, the two scores are not equally well evidenced: SpoolFlux has 8 ratings behind it against 1, so its average is the more settled of the two.

Scorecard3 real differences · 7 level
SpoolFlux versus SpoolTagWriter: the parameters behind the verdict, then further details
ParameterSpoolFluxSpoolTagWriter
PriceFreeFree
Rating5.0 (8 ratings) — better1.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings8 — better1
Update frequencyWeekly—
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhoneiPhone
Requires iOS18.6 — better26.2
Further details — not scored
Size7 MB6 MB
Age rating4+4+
DeveloperReimar MetzenVictor Nava

In-app purchases

None

SpoolFlux

No in-app purchases

None

SpoolTagWriter

No in-app purchases

Questions

Is SpoolFlux free?
SpoolFlux is free to download, with no in-app purchases.
Is SpoolTagWriter free?
SpoolTagWriter is free to download, with no in-app purchases.
Which has better reviews, SpoolFlux or SpoolTagWriter?
SpoolFlux is rated higher. SpoolFlux averages 5.0 out of 5 from 8 ratings, while SpoolTagWriter averages 1.0 from 1 ratings.
Do SpoolFlux or SpoolTagWriter have ads?
Neither SpoolFlux nor SpoolTagWriter shows ads.

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