# EO vs PreviewMD

EO and PreviewMD are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | EO | PreviewMD |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Size | 1 MB | 7 MB |
| Requires iOS | **16.0** | 17.0 |
| Devices | **iPhone, iPad, Mac, Apple Watch** | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Mobile Software AG](https://appshunter.io/developer/436758671) | [Michal Fanta](https://appshunter.io/developer/6787018314) |

## What reviewers say

### EO

[App page](https://appshunter.io/ios/app/eo-timer/id1669243693)

**In-app purchases:** none


### PreviewMD

[App page](https://appshunter.io/ios/app/previewmd/id6807862054)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is EO free?

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

### Is PreviewMD free?

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

### Do EO or PreviewMD have ads?

Neither EO nor PreviewMD 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.*