# SimpleUX vs mos.viewer

The clearest difference is in-app purchases: mos.viewer at none against SimpleUX's 6. mos.viewer also leads on iOS requirement (13.0 vs 17.0). SimpleUX's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. SimpleUX sells 6 in-app purchases, starting at $3.99 per month. mos.viewer asks for nothing beyond the download.

SimpleUX ships an update every 3 weeks, mos.viewer every 4 months. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | SimpleUX | mos.viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 4 months |
| Size | 30 MB | 23 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [SimpleUX](https://appshunter.io/developer/1687308124) | [Fabrik 19 AG](https://appshunter.io/developer/501964744) |

## What reviewers say

### SimpleUX

[App page](https://appshunter.io/ios/app/simpleux/id6448992049)

**Features:** Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| iPad Monthly plan | $3.99 | per month |
| Desktop Monthly plan | $6.99 | per month |
| Bundle Monthly plan | $9.99 | per month |
| iPad Annual plan | $19.99 | per year |
| Desktop Annual plan | $39.99 | per year |
| Bundle Annual plan | $59.99 | per year |


### mos.viewer

[App page](https://appshunter.io/ios/app/mosviewer/id6470921065)

**In-app purchases:** none


## Frequently asked questions

### Is SimpleUX free?

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

### Is mos.viewer free?

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

### Do SimpleUX or mos.viewer have ads?

Neither SimpleUX nor mos.viewer shows ads.

### Which is updated more often, SimpleUX or mos.viewer?

SimpleUX ships an update every 3 weeks, and mos.viewer every 4 months. Most recently, SimpleUX was updated on October 12, 2026 and mos.viewer on October 7, 2026.

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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.*