# Open3D vs Kuu3D

The clearest difference is in-app purchases: Open3D at none against Kuu3D's 1. Open3D also leads on update cadence (every 2 days vs weekly) and iOS requirement (15.0 vs 17.0). Kuu3D's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. Kuu3D sells 1 one-off in-app purchase. Open3D asks for nothing beyond the download.

Open3D ships an update every 2 days, Kuu3D weekly. Both last shipped on October 31, 2026.

## The numbers

| Metric | Open3D | Kuu3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (24 ratings)](https://appshunter.io/ios/app/open3d-stl-and-3d-model-viewer/id6772109964/reviews)** | — |
| Number of ratings | **24** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | Ad-supported | — |
| Size | 77 MB | 14 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) | [Hirofumi Tanjo](https://appshunter.io/developer/6823586314) |

## What reviewers say

### Open3D

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

View and edit a wide range of 3D model file formats directly on your device. Inspect models for 3D printing, convert between formats, and even view them in augmented reality. All processing is done locally, ensuring your files remain private.

**Highlights:** Supports over 15 3D file formats, On-device AR viewing with Quick Look, 3D printing readiness checks, Model conversion and export, Offline functionality, Local file processing, no cloud upload

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

**In-app purchases:** none


### Kuu3D

[App page](https://appshunter.io/ios/app/kuu3d/id6823961774)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Features | $4.99 | one-time |


## Frequently asked questions

### Is Open3D free?

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

### Is Kuu3D free?

Kuu3D is free to download, with in-app purchases available.

### Do Open3D or Kuu3D have ads?

Open3D shows ads; Kuu3D does not.

### Which is updated more often, Open3D or Kuu3D?

Open3D ships an update every 2 days, and Kuu3D weekly. Most recently, Open3D was updated on October 31, 2026 and Kuu3D on October 31, 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.*