# Operation Calculus vs Les posters

The clearest difference is iOS requirement: Operation Calculus at 8.0 against Les posters's 10.0. 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 | Operation Calculus | Les posters |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 34 months |
| Size | 27 MB | 124 MB |
| Requires iOS | **8.0** | 10.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [RX Labz](https://appshunter.io/developer/1223459761) | [Éditions JOCATOP](https://appshunter.io/developer/1438112476) |

## What reviewers say

### Operation Calculus

[App page](https://appshunter.io/ios/app/operation-calculus/id1461707284)

**Features:** macOS Compatibility

**In-app purchases:** none


### Les posters

[App page](https://appshunter.io/ios/app/les-posters-memos-de-maths-ce1/id1584320362)

**In-app purchases:** none


## Frequently asked questions

### Is Operation Calculus free?

Operation Calculus is free to download, with no in-app purchases.

### Is Les posters free?

Les posters is free to download, with no in-app purchases.

### Do Operation Calculus or Les posters have ads?

Neither Operation Calculus nor Les posters 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.*