# Screw vs Strainlabs Bolts

The clearest difference is iOS requirement: Screw at 7.1 against Strainlabs Bolts's 13.0. On price, ads, in-app purchases and device support there is nothing between them.

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

## The numbers

| Metric | Screw | Strainlabs Bolts |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 days |
| Size | 12 MB | 25 MB |
| Requires iOS | **7.1** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [AFS Advanced Fastening Solutions GmbH](https://appshunter.io/developer/965651486) | [Strainlabs AB](https://appshunter.io/developer/1892022828) |

## What reviewers say

### Screw

[App page](https://appshunter.io/ios/app/screw-designer-basic/id965651487)

**Features:** macOS Compatibility

**In-app purchases:** none


### Strainlabs Bolts

[App page](https://appshunter.io/ios/app/strainlabs-bolts/id6761909197)

**In-app purchases:** none


## Frequently asked questions

### Is Screw free?

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

### Is Strainlabs Bolts free?

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

### Do Screw or Strainlabs Bolts have ads?

Neither Screw nor Strainlabs Bolts shows ads.

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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.*