# Artus3d app vs Observe.

The clearest difference is update cadence: Artus3d app at every 2 months against Observe.'s every 8 months. Observe.'s advantage is iOS requirement (13.0 vs 15.0). On price, ads, 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.

Artus3d app ships an update every 2 months, Observe. every 8 months. The most recent releases landed on October 20, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | Artus3d app | Observe. |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 8 months |
| Size | 126 MB | 29 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [TechMed 3D](https://appshunter.io/developer/964196047) | [SELECT ICT Systems SAE](https://appshunter.io/developer/1780577476) |

## What reviewers say

### Artus3d app

[App page](https://appshunter.io/ios/app/artus3d-app/id6501994060)

**Features:** macOS Compatibility

**In-app purchases:** none


### Observe.

[App page](https://appshunter.io/ios/app/observe/id6738393422)

**In-app purchases:** none


## Frequently asked questions

### Is Artus3d app free?

Artus3d app is free to download, with no in-app purchases.

### Is Observe. free?

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

### Do Artus3d app or Observe. have ads?

Neither Artus3d app nor Observe. shows ads.

### Which is updated more often, Artus3d app or Observe.?

Artus3d app ships an update every 2 months, and Observe. every 8 months. Most recently, Artus3d app was updated on October 20, 2026 and Observe. on October 19, 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.*