# KnotBolts vs SpoolThreStu

The clearest difference is ads: KnotBolts at none against SpoolThreStu's shown. SpoolThreStu's advantage is update cadence (every 9 days vs every 6 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

KnotBolts ships an update every 6 weeks, SpoolThreStu every 9 days. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | KnotBolts | SpoolThreStu |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Size | 4 MB | 40 MB |
| Requires iOS | 15.0 | **14** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gabrielle Kenworthy](https://appshunter.io/developer/6806757134) | [Kamini Triparthy](https://appshunter.io/developer/1872562141) |

## What reviewers say

### KnotBolts

[App page](https://appshunter.io/ios/app/knotbolts/id6755597059)

**Features:** macOS Compatibility

**In-app purchases:** none


### SpoolThreStu

[App page](https://appshunter.io/ios/app/spoolthrestu/id6758364404)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is KnotBolts free?

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

### Is SpoolThreStu free?

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

### Do KnotBolts or SpoolThreStu have ads?

SpoolThreStu shows ads; KnotBolts does not.

### Which is updated more often, KnotBolts or SpoolThreStu?

KnotBolts ships an update every 6 weeks, and SpoolThreStu every 9 days. Most recently, KnotBolts was updated on October 14, 2026 and SpoolThreStu on October 17, 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.*