# SpoolFlux vs SpoolStack

The clearest difference is in-app purchases: SpoolFlux at none against SpoolStack's 2. SpoolStack's advantage is update cadence (every 2 days vs weekly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. SpoolStack sells 2 in-app purchases, starting at $4.99 per month. SpoolFlux asks for nothing beyond the download.

SpoolFlux ships an update weekly, SpoolStack every 2 days. The most recent releases landed on October 5, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | SpoolFlux | SpoolStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/spoolflux/id6757957454/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 2 days** |
| Monetization | Free | — |
| Size | 7 MB | 13 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Reimar Metzen](https://appshunter.io/developer/1453724835) | [Matthew Howell](https://appshunter.io/developer/1744641447) |

## What reviewers say

### 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


### SpoolStack

[App page](https://appshunter.io/ios/app/spoolstack/id6762043296)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SpoolStack Pro Monthly | $4.99 | per month |
| SpoolStack Pro Yearly | $49.99 | per year |


## Frequently asked questions

### Is SpoolFlux free?

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

### Is SpoolStack free?

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

### Do SpoolFlux or SpoolStack have ads?

Neither SpoolFlux nor SpoolStack shows ads.

### Which is updated more often, SpoolFlux or SpoolStack?

SpoolFlux ships an update weekly, and SpoolStack every 2 days. Most recently, SpoolFlux was updated on October 5, 2026 and SpoolStack on September 26, 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.*