# topological gate vs Professor Quantum

The clearest difference is iOS requirement: Professor Quantum at 15.0 against topological gate's 17.6. 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 | topological gate | Professor Quantum |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 6 MB | 172 MB |
| Requires iOS | 17.6 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [ICB LABS FZCO](https://appshunter.io/developer/6775509077) |

## What reviewers say

### topological gate

[App page](https://appshunter.io/ios/app/topological-gate/id6753909604)

**Features:** macOS Compatibility

**In-app purchases:** none


### Professor Quantum

[App page](https://appshunter.io/ios/app/professor-quantum/id6793537346)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is topological gate free?

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

### Is Professor Quantum free?

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

### Do topological gate or Professor Quantum have ads?

Neither topological gate nor Professor Quantum 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.*