# RPS 3D Viewer vs The Mark

The clearest difference is update cadence: The Mark at every 9 days against RPS 3D Viewer's monthly. 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.

RPS 3D Viewer ships an update monthly, The Mark every 9 days. The most recent releases landed on September 9, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | RPS 3D Viewer | The Mark |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 9 days** |
| Size | 98 MB | 300 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Rapid Prototyping Systems Limited](https://appshunter.io/developer/384045565) | [Virtual Viewing Ltd](https://appshunter.io/developer/535513548) |

## What reviewers say

### RPS 3D Viewer

[App page](https://appshunter.io/ios/app/rps-3d-viewer/id1497287592)

**Features:** macOS Compatibility

**In-app purchases:** none


### The Mark

[App page](https://appshunter.io/ios/app/the-mark/id6469025832)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RPS 3D Viewer free?

RPS 3D Viewer is free to download, with no in-app purchases.

### Is The Mark free?

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

### Do RPS 3D Viewer or The Mark have ads?

Neither RPS 3D Viewer nor The Mark shows ads.

### Which is updated more often, RPS 3D Viewer or The Mark?

RPS 3D Viewer ships an update monthly, and The Mark every 9 days. Most recently, RPS 3D Viewer was updated on September 9, 2026 and The Mark on September 12, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*