# LightUp Learning vs Merge Object Viewer

The clearest difference is rating: Merge Object Viewer at 4.5 against LightUp Learning's 3.0. Merge Object Viewer also leads on ratings volume (389 vs 10) and review sentiment (48% vs 32%). LightUp Learning's advantage is in-app purchases (none vs 4) and iOS requirement (8.1 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

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

Merge Object Viewer holds the better App Store score, 4.5 against 3.0. That said, the two scores are not equally well evidenced: Merge Object Viewer has 389 ratings behind it against 10, so its average is the more settled of the two. Written reviews point the same way: 32% of LightUp Learning's written reviews are positive against 48% of Merge Object Viewer's.

LightUp Learning ships an update every 2 months, Merge Object Viewer monthly. The most recent releases landed on October 7, 2026 and October 22, 2026 respectively.

## The numbers

| Metric | LightUp Learning | Merge Object Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (10 ratings)](https://appshunter.io/ios/app/lightup-learning/id817956889/reviews) | **[4.5 (389 ratings)](https://appshunter.io/ios/app/merge-object-viewer/id1367544362/reviews)** |
| Number of ratings | 10 | **389** |
| Positive reviews | 31.6% of reviews | **47.6% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Monthly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 143 MB | 414 MB |
| Requires iOS | **8.1** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LightUp](https://appshunter.io/developer/817956892) | [Merge Apps](https://appshunter.io/developer/1253049593) |

## What reviewers say

### LightUp Learning

[App page](https://appshunter.io/ios/app/lightup-learning/id817956889)

Build and learn about electronic circuits using magnetic blocks. Visualize electricity flow and program projects with drag-and-drop coding. Requires a physical LightUp kit.

**Highlights:** Magnetic circuit block assembly, Visualize electricity flow, Drag-and-drop coding interface, Project building guides, X-ray vision for circuits

**In-app purchases:** none


### 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


## Frequently asked questions

### Is LightUp Learning free?

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

### Is Merge Object Viewer free?

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

### Which has better reviews, LightUp Learning or Merge Object Viewer?

Merge Object Viewer is rated higher. LightUp Learning averages 3.0 out of 5 from 10 ratings, while Merge Object Viewer averages 4.5 from 389 ratings.

### Do LightUp Learning or Merge Object Viewer have ads?

Neither LightUp Learning nor Merge Object Viewer shows ads.

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

LightUp Learning ships an update every 2 months, and Merge Object Viewer monthly. Most recently, LightUp Learning was updated on October 7, 2026 and Merge Object Viewer on October 22, 2026.

---

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