# Screw Loop Puzzle vs Block Stack 16

The clearest difference is in-app purchases: Screw Loop Puzzle at none against Block Stack 16's 3. Screw Loop Puzzle also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price and ads there is nothing between them.

Both are free to download. Block Stack 16 sells 3 one-off in-app purchases. Screw Loop Puzzle asks for nothing beyond the download.

## The numbers

| Metric | Screw Loop Puzzle | Block Stack 16 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | Yes |
| Update frequency | Weekly | — |
| Size | 204 MB | 4 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Mehmet Fatih Sahin](https://appshunter.io/developer/1700697055) | [Wiz Studio](https://appshunter.io/developer/1436470398) |

## What reviewers say

### Screw Loop Puzzle

[App page](https://appshunter.io/ios/app/screw-loop-puzzle/id6759278433)

**Features:** macOS Compatibility

**In-app purchases:** none


### Block Stack 16

[App page](https://appshunter.io/ios/app/block-stack-16-bit-puzzle/id6759481143)

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| All Themes | $1.99 | one-time |
| Remove Ads | $1.99 | one-time |
| Bundle (Ads + Themes) | $2.99 | one-time |


## Frequently asked questions

### Is Screw Loop Puzzle free?

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

### Is Block Stack 16 free?

Block Stack 16 is free to download, with in-app purchases available.

### Do Screw Loop Puzzle or Block Stack 16 have ads?

Both Screw Loop Puzzle and Block Stack 16 show 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.*