# ByteMarker — MPO 3D Converter

> Converts and views 3D photo and video files in multiple formats. (iPhone/iPad app by Michael Newell.)

- Source: https://appshunter.io/ios/app/bytemarker/id1536108526 (this page in markdown: same URL + `.md`)
- Developer: [Michael Newell](https://appshunter.io/developer/438074478)
- Category: Photo & Video, Utilities
- Price: $9.99
- Age rating: 4+
- Requires: iOS 18.0 · 3 MB
- Languages: American English, Dutch, Canadian French, German (Germany), Hebrew, Hindi, Japanese, Russian, Chinese (Simplified, China), Latin American Spanish and 1 more
- Released: 2020-10-17
- Data updated: 2026-06-04
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/bytemarker/id1536108526/reviews.md

## What is ByteMarker?

Note: This app is optimized for iOS 18. The spatial video and photo features only work on iOS 18.

Note: To toggle 360 VR video, tap the L/R icon which will then show T/D.

A photo album with photography tools designed for 3D photo and video content, such as converting media files into anaglyph (red / cyan) and Left / Right stitched images.

Supported Formats:
- Apple Spatial Photo
- Apple Spatial Video
- MPO
- 3D AVI
- Adobe VR
- Left / Right 180 VR videos
- Top / Down 360 VR videos
- Left / Right Stitched Images

Directions:

1. Save the original supported media file to your device or iCloud account
2. From the ByteMarker app, click the + icon
3. Import the original supported media file using the Files browser
4. Tap the image cell to view the photo or video
5. Tap the Save button to save the photo or video to your library
6. Tap the . . . button on the top left of the Photos view to switch between export formats

## Key features

- 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)

## Recent user reviews (3 of 3)

All indexed reviews: https://appshunter.io/ios/app/bytemarker/id1536108526/reviews.md

### 1/5 — Warning: Does Not Work!

*2025-01-08*

Oh, how I wanted it to work.  I have a lot of MPO files and was hoping for an app that could convert them to spatial format for viewing on the AVP.  But sadly, the app quits unexpectedly every time I select an MPO file to convert.  The app just quits (closes).  Interestingly, if I try to load a file NOT in the MPO format, it gives me a message to let me know it’s not in the MPO format, but doesn’t quit unexpectedly.  So I assume it’s a glitch in the loading of the MPO file into the app that crashes it.

I’m hoping the app’s developer can actually get it working, or tell me what I’m doing wrong.  $5 wasted otherwise.  That’s what I get for buying an app with only 1 other review that said it wasn’t working.  Was hoping the newer version would make a difference.  It didn’t.

**Developer response:** Thank you for supporting the ByteMarker application! Spatial content now requires iOS 18 or macOS 15 and will be available in the next update. The initial rollout of spatial content used the multiview HEVC format which is no longer compatible with visionOS. The next release should be available in a week or so.

### 1/5 — Bad experience

*2024-06-26*

Wanted to convert 3D MPO image to Spatial 3D
Missing/invisible Save button. Found by luck\tapping around.
“Spatial” imagessupposedly saved and converted (by-luck) but never display in 3D on Apple Vision Pro.

**Developer response:** Hello,

Thank you for your feedback and for using the ByteMarker software!

I have the spatial photo and video conversion working and can confirm it decodes the tagged buffers for stereoscopic content.

I will release a new version of the app in a few weeks to improve the UI/UX.

Cheers,

### 1/5 — No way to save file

*2022-09-11*

This seems to be an incomplete app. The MPO file does not visably convert, and there is no save button.

## Frequently asked questions about ByteMarker

### What is ByteMarker?

ByteMarker is a photo and video album app with specialized tools for 3D content. It allows you to convert and view various 3D media files, including spatial photos and videos, into different formats like anaglyph and stitched images.

### What 3D formats does ByteMarker support?

ByteMarker supports a wide array of formats including Apple Spatial Photo, Apple Spatial Video, MPO, 3D AVI, Adobe VR, Left/Right 180 VR videos, Top/Down 360 VR videos, and Left/Right Stitched Images.

### How do I convert a file in ByteMarker?

To convert a file, save the original supported media to your device or iCloud, import it into ByteMarker using the '+' icon and Files browser, tap the media to view, and then use the 'Save' button to export it in your desired format.

### Does ByteMarker work on iOS 18?

Yes, the app is optimized for iOS 18, and its spatial video and photo features specifically require iOS 18 to function.

### How do I toggle 360 VR video view in ByteMarker?

To toggle the 360 VR video view, tap the L/R icon. This action will then display the T/D option, allowing you to switch between different viewing modes for 360 VR content.

### What devices is ByteMarker compatible with?

ByteMarker is available on Mac, iPhone, and iPad, offering a consistent experience across Apple's ecosystem for managing and converting your 3D media.

### How much does ByteMarker cost?

ByteMarker is a paid application, with a price of $9.99. This one-time purchase grants you access to all its features for converting and viewing 3D photo and video content.

### When was ByteMarker last updated?

The latest version of ByteMarker, 1.1.2, was last updated on November 24, 2025. This indicates ongoing support and potential for future improvements.

## Version history (last 5 releases)

### 1.1.2 — 2025-11-24

- Bug fixes on Spatial Photo import

### 1.1.1 — 2025-04-03

- Set minimum OS dependency to iOS 18 to ensure Spatial Photo and Spatial Video compatibility

### 1.1.0 — 2025-02-09

- Added 360 VR functionality
- Hide Status Bar on Media Playback
- Fixed bug to allow large file imports
- Bug fixes

### 1.0.9 — 2025-02-05

- Now uses Metal for all video shaders
- Add support for Adobe VR 180 photos and VR 180 videos
- Added hidden photos
- Complete redesign
- Bug fixes

### 1.0.8 — 2024-08-15

- Upgraded Anaglyph to real-time Metal shaders
- Added Spatial Video and Spatial Photo compatability
- Added PhotoPicker
- GUI Update
- Bug fixes

## Apps similar to ByteMarker

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [VR Photo](https://appshunter.io/ios/app/vr-photo/id476964777) | 1.0 (1) | $2.99 | Photo & Video |
| [Spherualizer](https://appshunter.io/ios/app/spherualizer/id834534399) | 4.7 (100) | $9.99 | Photo & Video |
| [3D Video-Converter](https://appshunter.io/ios/app/3d-video-converter/id6475671513) | — | $3.99 | Photo & Video |
| [Spatial Media Toolkit](https://appshunter.io/ios/app/spatial-media-toolkit/id6477903679) | 4.5 (100) | Free | Photo & Video |
| [VR360 Player](https://appshunter.io/ios/app/vr360-player/id6737597671) | — | $0.99 | Photo & Video |
| [Video to Photo: High Quality](https://appshunter.io/ios/app/video-to-photo-high-quality/id1544125793) | 4.6 (416) | Free | Photo & Video |

## More apps by Michael Newell

- [Utility+](https://appshunter.io/ios/app/utility-plus/id1381200125)
- [Swiftly Solitaire](https://appshunter.io/ios/app/swiftly-solitaire/id1488113324)
- [BufferLoop](https://appshunter.io/ios/app/bufferloop/id1535149219)
- [KeyFilter](https://appshunter.io/ios/app/keyfilter/id1536178083)
- [SeekPlayer](https://appshunter.io/ios/app/seekplayer/id1542540436)

All apps by Michael Newell: https://appshunter.io/developer/438074478

## Related topics

[bytemarker](https://appshunter.io/ios/topics/bytemarker)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*