# EDAN CMS vs WEINMANN O2 Calculator

The clearest difference is iOS requirement: EDAN CMS at 12.0 against WEINMANN O2 Calculator's 14.0. 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 | EDAN CMS | WEINMANN O2 Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 20 months | — |
| Size | 28 MB | 6 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [EDAN Instruments, Inc.](https://appshunter.io/developer/869238782) | [Fadi Amawi](https://appshunter.io/developer/1855900257) |

## What reviewers say

### EDAN CMS

[App page](https://appshunter.io/ios/app/edan-cms/id1554979640)

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

**In-app purchases:** none


### WEINMANN O2 Calculator

[App page](https://appshunter.io/ios/app/weinmann-o2-calculator/id6755727601)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is EDAN CMS free?

EDAN CMS is free to download, with no in-app purchases.

### Is WEINMANN O2 Calculator free?

WEINMANN O2 Calculator is free to download, with no in-app purchases.

### Do EDAN CMS or WEINMANN O2 Calculator have ads?

Neither EDAN CMS nor WEINMANN O2 Calculator 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.*