# WormGears Brain vs Sync Duo

WormGears Brain and Sync Duo are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

## The numbers

| Metric | WormGears Brain | Sync Duo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Size | 191 MB | 36 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [Ka Chun CHEUNG](https://appshunter.io/developer/1475447863) | [Murat Erdem Bostancioglu](https://appshunter.io/developer/1454618949) |

## What reviewers say

### WormGears Brain

[App page](https://appshunter.io/ios/app/wormgears-brain-teasing-puzzle/id6762055121)

**In-app purchases:** none


### Sync Duo

[App page](https://appshunter.io/ios/app/sync-duo/id6821461669)

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

**In-app purchases:** none


## Frequently asked questions

### Is WormGears Brain free?

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

### Is Sync Duo free?

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

### Do WormGears Brain or Sync Duo have ads?

Both WormGears Brain and Sync Duo show ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*