SpoolTags vs KatMon
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
SpoolTags
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Never lose track of your 3D printer filament again. SpoolTags helps you organize, track, and manage all your filament spools with QR codes and NFC tags. SMART ORGANIZATION β’ Automatically group spools by manufacturer, material, variant, and color β’ Track starting weight, current weight, and empty spool weight β’ Get low-stock alerts when filament is running low β’ Archive finished spools to keep your library clean EASY IDENTIFICATION β’ Generate printable QR code label sheets (A4 format) β’ Scan QR codes to instantly find or create spool records β’ Support for NFC tags as backup identifiers (iOS) β’ Human-readable slugs like "brisk-wolf-0427" for quick reference SYNC EVERYWHERE β’ iCloud sync keeps your spool library updated across all devices β’ Works on iPhone, iPad, and Mac β’ Export to CSV for spreadsheet analysis PRINT-READY LABELS β’ Generate professional label sheets with QR codes β’ Multiple labels per spool (for spool sides, AMS cards, and spares) β’ A4 template optimized for standard label paper FREE TO START β’ Track up to 10 active spools for free β’ Archived spools don't count toward your limit β’ One-time purchase to unlock unlimited spools Perfect for makers, hobbyists, and anyone with a growing filament collection. Stop guessing what's on your spools and start tracking with SpoolTags.
KatMon
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KatMon is an all-in-one digital toolbox designed for 3D printer users and makers to streamline every step of the production process. More than just a filament management tool, it is a smart ecosystem that brings artificial intelligence, creator networking, STL analysis, and printer maintenance monitoring right to your pocketβkeeping your 3D printing workflow controlled, layer by layer. Key Features: Smart Filament Calculator & Inventory Management: Accurately calculate remaining filament weight using our comprehensive empty spool database, and track your entire inventory with zero errors. STL Viewer & Material Analysis: Preview your 3D models directly within the app, and calculate volume, weight, and material costs before sending them to print. Gemini AI-Powered Assistant: Get instant solutions for print failures, slicing configurations, and technical troubleshooting from a dedicated 3D printing AI companion. Maker Network: Connect with fellow makers, showcase your latest 3D prints, share slicer profiles, and solve technical challenges together with the community. Maintenance Monitor & Scheduler: Never forget nozzle replacements, belt tensioning, or rod lubrication. Extend your printer's lifespan with customized maintenance alerts. 3D Printing News & Tech Trends: Stay up to date with the latest industry innovations, new filament releases, and community updates. Spool Tower Mini-Game: Pass the time while waiting for your long prints to finish with a fun, maker-themed mini-game. Why KatMon? Varying empty spool weights across brands make guessing remaining filament highly inaccurate. Running out of material mid-print ruins projects, wastes time, and costs money. KatMon eliminates the guesswork by providing powerful calculation tools, a built-in STL preview engine, and advanced AI assistance to make your 3D printing workflow controlled, seamless, and efficient. Start creating with the ultimate digital companion for your 3D printer today!
Screenshots
Verdict
The clearest difference is in-app purchases: KatMon at none against SpoolTags's 1. KatMon also leads on iOS requirement (15.0 vs 17.0). On price, ads and device support there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. SpoolTags sells 1 one-off in-app purchase. KatMon asks for nothing beyond the download.
| Parameter | SpoolTags | KatMon |
|---|---|---|
| Price | Free | Free |
| Update frequency | β | Every 2 days |
| Ads | No | No |
| In-app purchases | Yes | No β better |
| Devices | iPhone, iPad, Mac β better | iPhone, iPod |
| Requires iOS | 17.0 | 15.0 β better |
| Further details β not scored | ||
| Size | 2 MB | 33 MB |
| Age rating | 4+ | 4+ |
| Developer | Andrew Jeffries | Olcay OREN |
In-app purchases
SpoolTags
- Lifetime unlock$5.99
KatMon
No in-app purchases







