# entanglement entropy vs EqCalc

The clearest difference is in-app purchases: entanglement entropy at none against EqCalc's 1. On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. EqCalc sells 1 one-off in-app purchase. entanglement entropy asks for nothing beyond the download.

## The numbers

| Metric | entanglement entropy | EqCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 2 months |
| Size | 5 MB | 11 MB |
| Requires iOS | **18.0** | 18.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 17+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [Jon Tonouchi](https://appshunter.io/developer/1814163396) |

## What reviewers say

### entanglement entropy

[App page](https://appshunter.io/ios/app/entanglement-entropy/id6737193148)

**Features:** macOS Compatibility

**In-app purchases:** none


### EqCalc

[App page](https://appshunter.io/ios/app/eqcalc-g/id6759407516)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Version | $2.99 | one-time |


## Frequently asked questions

### Is entanglement entropy free?

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

### Is EqCalc free?

EqCalc is free to download, with in-app purchases available.

### Do entanglement entropy or EqCalc have ads?

Neither entanglement entropy nor EqCalc 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.*