Comparison

SpoolKeep vs SpoolFlux

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

Head to head
About

SpoolKeep

Features
Read full description

Simple 3D Printing Filament Spools Management Forget complex spreadsheets and bloated apps! SpoolKeep focuses on what matters to efficiently manage your filament collection. ALSO AVAILABLE ON MAC: • Same Apple ID? Your data syncs automatically via iCloud • Premium already purchased on iPhone? It works on Mac too — no need to buy it twice! • Seamless experience across all your Apple devices FREE VERSION - LIMITED TO 10 SPOOLS: • Perfect for getting started • All features included • Upgrade anytime to unlock unlimited spools PREMIUM UPGRADE - ONE-TIME PURCHASE: • Unlock unlimited spools (no recurring fees) • Single purchase, lifetime access • Shared across your iPhone and Mac • Perfect for serious 3D printing enthusiasts SIMPLE AND EFFECTIVE: • Clean, intuitive interface • Instant familiarity • No unnecessary features • Everything you actually need, nothing more THE ESSENTIALS, WELL DESIGNED: • Catalog your spools (PLA, PETG, ABS, TPU...) • Track your inventory in just a few taps • Find your filaments quickly • Add photos for instant identification • Easily spot started spools PRACTICAL AND FLEXIBLE: • Smart suggestions to avoid repetitive typing • Simple sorting by family, brand, type, or custom • Quick search • Data export/import and report

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

SpoolKeep4 screens
SpoolFlux4 screens

Verdict

The call

The clearest difference is in-app purchases: SpoolFlux at none against SpoolKeep's 1. SpoolFlux also leads on update cadence (weekly vs every 2 months). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. SpoolKeep sells 1 one-off in-app purchase. SpoolFlux asks for nothing beyond the download.

UpkeepUpdate frequency

SpoolKeep ships an update every 2 months, SpoolFlux weekly. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.

Scorecard2 real differences · 8 level
SpoolKeep versus SpoolFlux: the parameters behind the verdict, then further details
ParameterSpoolKeepSpoolFlux
PriceFreeFree
Rating—5.0 (8 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—8 — better
Update frequencyEvery 2 monthsWeekly — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhoneiPhone
Requires iOS17 — better18.6
Further details — not scored
Size3 MB7 MB
Age rating4+4+
DeveloperClaude-Alain MullerReimar Metzen

In-app purchases

1 purchases

SpoolKeep

One-time1
  • SpoolKeep Premium$1.99
None

SpoolFlux

No in-app purchases

Questions

Is SpoolKeep free?
SpoolKeep is free to download, with in-app purchases available.
Is SpoolFlux free?
SpoolFlux is free to download, with no in-app purchases.
Do SpoolKeep or SpoolFlux have ads?
Neither SpoolKeep nor SpoolFlux shows ads.
Which is updated more often, SpoolKeep or SpoolFlux?
SpoolKeep ships an update every 2 months, and SpoolFlux weekly. Most recently, SpoolKeep was updated on September 19, 2026 and SpoolFlux on September 14, 2026.

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