# GHZ state vs Positional Encoding

The clearest difference is iOS requirement: GHZ state at 16 against Positional Encoding's 18.5. 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 | GHZ state | Positional Encoding |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Monthly |
| Size | 6 MB | 2 MB |
| Requires iOS | **16** | 18.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [carl nohre](https://appshunter.io/developer/452344755) |

## What reviewers say

### GHZ state

[App page](https://appshunter.io/ios/app/ghz-state/id6743487296)

**Features:** macOS Compatibility

**In-app purchases:** none


### Positional Encoding

[App page](https://appshunter.io/ios/app/positional-encoding/id6749869150)

**In-app purchases:** none


## Frequently asked questions

### Is GHZ state free?

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

### Is Positional Encoding free?

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

### Do GHZ state or Positional Encoding have ads?

Neither GHZ state nor Positional Encoding 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.*