Comparison

Spool Buddy vs SpoolFlux

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

Head to head
About

Spool Buddy

Effortlessly manage your 3D printing filament inventory. Track brands, colors, and usage with a simple, fast interface. Syncs seamlessly across Apple devices without requiring logins or network calls.

Highlights
  • iCloud syncing
  • No logins or network calls
  • Track brands, colors, and modifiers
  • Search and filter by properties
  • Usage and inventory tracking
  • Optimized for iOS and macOS
Features
Read full description

Filament tracking for 3D printing, without the fuss. Spool Buddy is a simple, fast filament inventory app made for hobbyists who want to know what filament they have, where it is, and how much is left — without accounts, subscriptions, tracking, or complicated setup. Add your filaments, organize them by brand, material, color, location, modifiers, and more. Track usage across one or multiple spools, keep drying logs, attach photos, archive old filament, and export or print your inventory when you need it. Spool Buddy syncs with iCloud, so your filament library stays up to date across iPhone, iPad, and Mac without creating an account. Features include: - Track filament inventory, usage, and remaining amounts - Multi-spool support for filaments - NFC reading and writing - iCloud sync with no logins - Photos for filament entries - Drying logs - Custom brands and materials - Detailed filament information, including colors, polymers, modifiers, fillers, and visual properties - Automatic color names and color family filtering - Support for gradients and complex filament colors - Filter by storage location, brand, color family, modifiers, and polymer - Sort by price, date added, color, brand, and name - Group by brand or material - Usage indicators at a glance - Archive filaments you no longer actively use - Export your inventory to CSV - Print your filament inventory - Optimized for iOS and macOS 26 - Small, fast, and designed to stay out of your way Spool Buddy is completely free to use. There are no subscriptions, no locked features, and no required purchases. In-app purchases are optional tips only, for people who want to support the app’s development. Made by an indie solo developer for people who just want a clean, useful way to manage their filament.

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

Screenshots

Spool Buddy4 screens
SpoolFlux4 screens

Verdict

The call

The clearest difference is rating: SpoolFlux at 5.0 against Spool Buddy's 4.3. SpoolFlux also leads on in-app purchases (none vs 3). Spool Buddy's advantage is device support (3 vs 1). On price, review sentiment, ratings volume and update cadence 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. Spool Buddy sells 3 one-off in-app purchases. SpoolFlux asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

SpoolFlux holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 9 and 8 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Spool Buddy ships an update every 2 weeks, SpoolFlux weekly. The most recent releases landed on September 8, 2026 and September 14, 2026 respectively.

Scorecard4 real differences · 6 level
Spool Buddy versus SpoolFlux: the parameters behind the verdict, then further details
ParameterSpool BuddySpoolFlux
PriceFreeFree
Rating4.3 (9 ratings)5.0 (8 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings9 — better8
Update frequencyEvery 2 weeksWeekly — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, Mac — betteriPhone
Requires iOS18.2 — better18.6
Further details — not scored
Size8 MB7 MB
Age rating4+4+
DeveloperMartian Code OyReimar Metzen

Customer experience

Spool Buddy

All ratings9 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

SpoolFlux

All ratings8 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

3 purchases

Spool Buddy

One-time3
  • Small Tip$0.99
  • Medium Tip$2.99
  • Large Tip$4.99
None

SpoolFlux

No in-app purchases

Questions

Is Spool Buddy free?
Spool Buddy is free to download, with in-app purchases available.
Is SpoolFlux free?
SpoolFlux is free to download, with no in-app purchases.
Which has better reviews, Spool Buddy or SpoolFlux?
SpoolFlux is rated higher. Spool Buddy averages 4.3 out of 5 from 9 ratings, while SpoolFlux averages 5.0 from 8 ratings.
Do Spool Buddy or SpoolFlux have ads?
Neither Spool Buddy nor SpoolFlux shows ads.
Which is updated more often, Spool Buddy or SpoolFlux?
Spool Buddy ships an update every 2 weeks, and SpoolFlux weekly. Most recently, Spool Buddy was updated on September 8, 2026 and SpoolFlux on September 14, 2026.

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