# ShadowMark vs EEG DSA Viewer

ShadowMark and EEG DSA Viewer 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 | ShadowMark | EEG DSA Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | — |
| Size | 3 MB | 4 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [RYUTA SHIMOGAUCHI](https://appshunter.io/developer/6775823754) | [Michiyoshi Sanuki](https://appshunter.io/developer/6797550055) |

## What reviewers say

### ShadowMark

[App page](https://appshunter.io/ios/app/shadowmark/id6775823482)

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

**In-app purchases:** none


### EEG DSA Viewer

[App page](https://appshunter.io/ios/app/eeg-dsa-viewer/id6814561806)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is ShadowMark free?

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

### Is EEG DSA Viewer free?

EEG DSA Viewer is free to download, with no in-app purchases.

### Do ShadowMark or EEG DSA Viewer have ads?

Neither ShadowMark nor EEG DSA Viewer 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.*