# Spool Master vs KatMon

The clearest difference is in-app purchases: KatMon at none against Spool Master's 2. KatMon also leads on ads (none vs shown) and update cadence (every 2 days vs every 4 days). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Spool Master sells 2 in-app purchases, starting at $1.99 per month. KatMon asks for nothing beyond the download.

Spool Master ships an update every 4 days, KatMon every 2 days. The most recent releases landed on October 1, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Spool Master | KatMon |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/spool-master/id6757678949/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 39 MB | 33 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sebastien Girod](https://appshunter.io/developer/1472154080) | [Olcay OREN](https://appshunter.io/developer/1894051255) |

## What reviewers say

### Spool Master

[App page](https://appshunter.io/ios/app/spool-master/id6757678949)

Manage your 3D printing filament stock with NFC tag reading/writing, inventory tracking, and smart shopping lists. Optimize expenses and reduce waste for hobbyists and professionals.

**Highlights:** NFC reading and writing for spool tags, Complete inventory management, Detailed statistics and value tracking, Automatic low stock alerts, Smart shopping list generation, Print settings configuration, Multi-device synchronization

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spool Master Monthly | $1.99 | per month |
| Spool Master Yearly | $9.99 | per year |


### KatMon

[App page](https://appshunter.io/ios/app/katmon/id6762404551)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Spool Master free?

Spool Master is free to download, with in-app purchases available.

### Is KatMon free?

KatMon is free to download, with no in-app purchases.

### Do Spool Master or KatMon have ads?

Spool Master shows ads; KatMon does not.

### Which is updated more often, Spool Master or KatMon?

Spool Master ships an update every 4 days, and KatMon every 2 days. Most recently, Spool Master was updated on October 1, 2026 and KatMon on October 3, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*