SpoolKeep vs SpoolFlux
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SpoolKeep
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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
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
Screenshots
Verdict
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
Both are free to download. SpoolKeep sells 1 one-off in-app purchase. SpoolFlux asks for nothing beyond the download.
SpoolKeep ships an update every 2 months, SpoolFlux weekly. The most recent releases landed on September 19, 2026 and September 14, 2026 respectively.
| Parameter | SpoolKeep | SpoolFlux |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (8 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 8 — better |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | — | Free |
| Devices | iPhone | iPhone |
| Requires iOS | 17 — better | 18.6 |
| Further details — not scored | ||
| Size | 3 MB | 7 MB |
| Age rating | 4+ | 4+ |
| Developer | Claude-Alain Muller | Reimar Metzen |
In-app purchases
SpoolKeep
- SpoolKeep Premium$1.99
SpoolFlux
No in-app purchases









