# Merge Object Viewer vs MARVLS

The clearest difference is review sentiment: MARVLS at 100% against Merge Object Viewer's 48%. MARVLS also leads on rating (5.0 vs 4.5) and in-app purchases (none vs 4). Merge Object Viewer's advantage is ratings volume (389 vs 2) and update cadence (monthly vs every 5 months). On price and ads there is nothing between them.

Both are free to download. Merge Object Viewer sells 4 in-app purchases, starting at $9.99 per month. MARVLS asks for nothing beyond the download.

MARVLS holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Merge Object Viewer has 389 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 48% of Merge Object Viewer's written reviews are positive against 100% of MARVLS's.

Merge Object Viewer ships an update monthly, MARVLS every 5 months. The most recent releases landed on October 13, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Merge Object Viewer | MARVLS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (389 ratings)](https://appshunter.io/ios/app/merge-object-viewer/id1367544362/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/marvls-plasma-physics/id6452503298/reviews)** |
| Number of ratings | **389** | 2 |
| Positive reviews | 47.6% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 414 MB | 210 MB |
| Requires iOS | **15.0** | 18 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Merge Apps](https://appshunter.io/developer/1253049593) | [Michele McColgan](https://appshunter.io/developer/1532617986) |

## What reviewers say

### Merge Object Viewer

[App page](https://appshunter.io/ios/app/merge-object-viewer/id1367544362)

Explore hundreds of 3D digital teaching aids with this app. Students can interact with models of rocks, mammals, cells, and more. The app also allows users to upload and view their own 3D objects on a compatible device.

**Highlights:** Hundreds of 3D teaching aids, Interactive 3D models, Learn about science and biology, Upload and view custom 3D objects, Hands-on digital learning

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Object Viewer Premium Monthly | $9.99 | per month |
| Merge EDU Individual | $9.99 | per month |
| Object Viewer Premium Annual | $99.99 | per year |
| Merge EDU Individual | $99.99 | per year |

**What reviewers like**

- 🚀 Engaging AR STEM tool
- 👍 Intuitive interface
- 👍 Seamless object merging
- 👍 Extensive file format support
- 👍 Convenient sharing options

**What reviewers complain about**

- 🐛 Frequent crashes
- 🐛 Slow rendering/loading
- 🐛 Compatibility issues on older devices
- 🔒 Paywall for full access
- 🐛 Unstable login/account management

**Reported bugs**

- Objects not loading or displaying incorrectly
- App freezing or closing unexpectedly
- Labeling/annotation issues with 3D objects
- Compatibility problems on iPads and older iOS versions

**Requested features**

- Adjustable lighting for 3D objects
- Ability to snap objects together
- Camera button for capturing scenes
- Restore VR support
- More free 3D content options


### MARVLS

[App page](https://appshunter.io/ios/app/marvls-plasma-physics/id6452503298)

Explore plasma physics concepts with interactive augmented reality models. Visualize and manipulate these models using your phone and a downloadable Merge Cube. Navigate through various topics and bring complex scientific ideas to life.

**Highlights:** Augmented reality models, Plasma physics concepts, Merge Cube integration, Interactive visualization, Topic navigation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Merge Object Viewer free?

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

### Is MARVLS free?

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

### Which has better reviews, Merge Object Viewer or MARVLS?

MARVLS is rated higher. Merge Object Viewer averages 4.5 out of 5 from 389 ratings, while MARVLS averages 5.0 from 2 ratings.

### Do Merge Object Viewer or MARVLS have ads?

Neither Merge Object Viewer nor MARVLS shows ads.

### Which is updated more often, Merge Object Viewer or MARVLS?

Merge Object Viewer ships an update monthly, and MARVLS every 5 months. Most recently, Merge Object Viewer was updated on October 13, 2026 and MARVLS on October 3, 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.*