# ByteMarker vs MPO Viewer

The clearest difference is price: MPO Viewer at Free against ByteMarker's $9.99. MPO Viewer also leads on update cadence (every 3 days vs monthly). ByteMarker's advantage is in-app purchases (none vs 1) and device support (3 vs 1). On ads there is nothing between them.

MPO Viewer is free to download; ByteMarker costs $9.99 up front. MPO Viewer sells 1 one-off in-app purchase. ByteMarker asks for nothing beyond the download.

ByteMarker ships an update monthly, MPO Viewer every 3 days. The most recent releases landed on November 3, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | ByteMarker | MPO Viewer |
| --- | --- | --- |
| Price | $9.99 | **Free** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 days** |
| Monetization | Paid | — |
| Size | 3 MB | 65 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Michael Newell](https://appshunter.io/developer/438074478) | [G.G. van der Steen](https://appshunter.io/developer/6800212440) |

## What reviewers say

### ByteMarker

[App page](https://appshunter.io/ios/app/bytemarker/id1536108526)

This app converts 3D media files into various formats like anaglyph and stitched images. It supports a wide range of 3D photo and video formats, making it a versatile tool for viewing and exporting spatial content.

**Highlights:** 3D media file conversion, Anaglyph (red/cyan) output, Left/Right stitched image output, Supports Apple Spatial formats, Supports MPO and 3D AVI, VR video viewing (180/360)

**In-app purchases:** none


### MPO Viewer

[App page](https://appshunter.io/ios/app/mpo-viewer/id6800211928)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MPO Viewer Pro | $4.99 | one-time |


## Frequently asked questions

### Is ByteMarker free?

ByteMarker costs $9.99, with no in-app purchases.

### Is MPO Viewer free?

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

### Do ByteMarker or MPO Viewer have ads?

Neither ByteMarker nor MPO Viewer shows ads.

### Which is updated more often, ByteMarker or MPO Viewer?

ByteMarker ships an update monthly, and MPO Viewer every 3 days. Most recently, ByteMarker was updated on November 3, 2026 and MPO Viewer on November 6, 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.*