# Open3D vs TopMod 3D

The clearest difference is ads: TopMod 3D at none against Open3D's shown. TopMod 3D also leads on rating (5.0 vs 4.8) and monetization model (free vs ad-supported). Open3D's advantage is update cadence (every 2 days vs every 5 days) and ratings volume (22 vs 3). On price, 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.

TopMod 3D holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Open3D has 22 ratings behind it against 3, so its average is the more settled of the two.

Open3D ships an update every 2 days, TopMod 3D every 5 days. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Open3D | TopMod 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.8 (22 ratings)](https://appshunter.io/ios/app/open3d-stl-and-3d-model-viewer/id6772109964/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/topmod-3d-design-software/id6779650858/reviews)** |
| Number of ratings | **22** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Every 5 days |
| Monetization | Ad-supported | **Free** |
| Size | 77 MB | 4 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Rajesh Konatala](https://appshunter.io/developer/1882436576) | [John Briscella](https://appshunter.io/developer/1889049396) |

## What reviewers say

### Open3D

[App page](https://appshunter.io/ios/app/open3d-stl-and-3d-model-viewer/id6772109964)

Instantly view and inspect a wide range of 3D file formats directly on your device. Offers AR viewing, 3D printing readiness checks, and detailed model specifications without requiring an account or cloud upload.

**Highlights:** Supports over 15 3D file formats, Augmented Reality (AR) viewing via Apple Quick Look, 3D printing readiness checks (manifold, overhangs, wall thickness), On-device processing, no cloud upload required, Detailed model specifications (triangle count, bounding box), Export between GLB and STL formats, Offline functionality

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

**In-app purchases:** none


### TopMod 3D

[App page](https://appshunter.io/ios/app/topmod-3d-design-software/id6779650858)

Sculpt intricate 3D surfaces with topological modeling on your mobile device. Create complex geometry, including handles and holes, and export your designs as OBJ files for use in other 3D software. Ideal for artists and designers interested in the mathematics of form.

**Highlights:** Topological mesh modeling, Sculpt intricate 3D surfaces, Create handles and holes, Real-time geometry building, Export as OBJ files

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

**In-app purchases:** none


## Frequently asked questions

### Is Open3D free?

Open3D is free to download, with no in-app purchases.

### Is TopMod 3D free?

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

### Which has better reviews, Open3D or TopMod 3D?

TopMod 3D is rated higher. Open3D averages 4.8 out of 5 from 22 ratings, while TopMod 3D averages 5.0 from 3 ratings.

### Do Open3D or TopMod 3D have ads?

Open3D shows ads; TopMod 3D does not.

### Which is updated more often, Open3D or TopMod 3D?

Open3D ships an update every 2 days, and TopMod 3D every 5 days. Most recently, Open3D was updated on October 25, 2026 and TopMod 3D on October 24, 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.*