# Clay Box vs SpoolFlux

The clearest difference is price: SpoolFlux at Free against Clay Box's $4.99. SpoolFlux also leads on rating (5.0 vs 4.4) and in-app purchases (none vs 15). Clay Box's advantage is ratings volume (40 vs 8) and device support (3 vs 1). On ads there is nothing between them.

SpoolFlux is free to download; Clay Box costs $4.99 up front. Clay Box sells 15 one-off in-app purchases. SpoolFlux asks for nothing beyond the download.

SpoolFlux holds the better App Store score, 5.0 against 4.4. That said, the two scores are not equally well evidenced: Clay Box has 40 ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 71% of Clay Box's written reviews are positive against 100% of SpoolFlux's.

Clay Box ships an update every 2 months, SpoolFlux weekly. The most recent releases landed on October 24, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | Clay Box | SpoolFlux |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.4 (40 ratings)](https://appshunter.io/ios/app/clay-box/id1488510965/reviews) | **[5.0 (8 ratings)](https://appshunter.io/ios/app/spoolflux/id6757957454/reviews)** |
| Number of ratings | **40** | 8 |
| Positive reviews | 70.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 months | **Weekly** |
| Monetization | Paid | **Free** |
| Size | 9 MB | 7 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sarah Hill](https://appshunter.io/developer/1378029846) | [Reimar Metzen](https://appshunter.io/developer/1453724835) |

## What reviewers say

### Clay Box

[App page](https://appshunter.io/ios/app/clay-box/id1488510965)

Discover and create clay recipes, design color palettes using photos, and find complementary colors. Search for recipes by specific clay colors or explore their appearance in blends. Supports multiple popular clay brands.

**Highlights:** Access clay recipe database, Create custom recipes, Design color palettes from photos, Find analogous/complementary colors, Search recipes by color, Supports multiple clay brands

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

**In-app purchases (15)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Earth tones palette - Prem0 | Free | one-time |
| Greens palette - Premo | $1.99 | one-time |
| Sandy Teal color palette | $1.99 | one-time |
| Orange Ombre palette | $1.99 | one-time |
| Metallic Fall Colors | $1.99 | one-time |
| Metallic Mermaid palette | $1.99 | one-time |
| Sweater weather palette | $1.99 | one-time |
| Succulent palette | $1.99 | one-time |
| Blue Jeans palette | $1.99 | one-time |
| Pink Lily palette | $1.99 | one-time |
| Halloween Metallics - Premo | $1.99 | one-time |
| Tutti Frutti palette | $1.99 | one-time |
| Wildflower palette - Premo | $1.99 | one-time |
| Pink sunset palette | $1.99 | one-time |
| Adrift at Sea | $1.99 | one-time |


### SpoolFlux

[App page](https://appshunter.io/ios/app/spoolflux/id6757957454)

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

**In-app purchases:** none


## Frequently asked questions

### Is Clay Box free?

Clay Box costs $4.99, and also offers in-app purchases.

### Is SpoolFlux free?

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

### Which has better reviews, Clay Box or SpoolFlux?

SpoolFlux is rated higher. Clay Box averages 4.4 out of 5 from 40 ratings, while SpoolFlux averages 5.0 from 8 ratings.

### Do Clay Box or SpoolFlux have ads?

Neither Clay Box nor SpoolFlux shows ads.

### Which is updated more often, Clay Box or SpoolFlux?

Clay Box ships an update every 2 months, and SpoolFlux weekly. Most recently, Clay Box was updated on October 24, 2026 and SpoolFlux on October 22, 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.*