# Gauge vs Spool Master

The clearest difference is ads: Gauge at none against Spool Master's shown. Spool Master's advantage is update cadence (every 4 days vs every 2 months) and iOS requirement (15.0 vs 18.5). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Gauge sells 1 one-off in-app purchase and Spool Master sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

Gauge ships an update every 2 months, Spool Master every 4 days. The most recent releases landed on September 20, 2026 and September 13, 2026 respectively.

## The numbers

| Metric | Gauge | Spool Master |
| --- | --- | --- |
| 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 | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 4 days** |
| Monetization | — | Free with in-app purchases |
| Size | 4 MB | 39 MB |
| Requires iOS | 18.5 | **15.0** |
| Devices | iPhone | **iPhone, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Herri.es Limited](https://appshunter.io/developer/1828571439) | [Sebastien Girod](https://appshunter.io/developer/1472154080) |

## What reviewers say

### Gauge

[App page](https://appshunter.io/ios/app/gauge/id6755354159)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Gauge Pro | $4.99 | one-time |


### 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 |


## Frequently asked questions

### Is Gauge free?

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

### Is Spool Master free?

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

### Do Gauge or Spool Master have ads?

Spool Master shows ads; Gauge does not.

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

Gauge ships an update every 2 months, and Spool Master every 4 days. Most recently, Gauge was updated on September 20, 2026 and Spool Master on September 13, 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.*