# Viana 2 vs AR.X Optics

The clearest difference is monetization model: AR.X Optics at free against Viana 2's paid. AR.X Optics also leads on review sentiment (75% vs 42%) and device support (3 vs 1). On price, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Viana 2 | AR.X Optics |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 42.3% of reviews | **75.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Monetization | Paid | **Free** |
| Size | 19 MB | 189 MB |
| Requires iOS | 17.4 | **12.0** |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Freie Universitaet Berlin](https://appshunter.io/developer/1031084427) | [Johannes Gutenberg-Universität Mainz](https://appshunter.io/developer/877501807) |

## What reviewers say

### Viana 2

[App page](https://appshunter.io/ios/app/viana-2/id1554845327)

This app allows users to record and analyze motion from videos. It automatically determines the trajectory, position, and velocity of objects, offering advanced graphing and coordinate system tools for physics education.

**Highlights:** Record and analyze motion from videos, Automatic trajectory, position, and velocity determination, Adjustable video frame rates, Object tracking with marker adjustment, Display up to three graph types simultaneously, New phase diagram types, Real-time coordinate system and graph comparison, Export and import projects

**In-app purchases:** none


### AR.X Optics

[App page](https://appshunter.io/ios/app/arx-optics/id1613699573)

This app uses augmented reality to overlay virtual objects onto real-world environments, transforming placeholder cards into interactive science experiments. It currently focuses on optics, allowing users to explore concepts like lasers, mirrors, and lenses with accurate physical modeling.

**Highlights:** Augmented reality for virtual object overlay, Interactive science experiment simulations, Focus on optics (lasers, mirrors, lenses), Accurate physical modeling of phenomena, Use of placeholder cards for AR activation

**In-app purchases:** none


## Frequently asked questions

### Is Viana 2 free?

Viana 2 is free to download, with no in-app purchases.

### Is AR.X Optics free?

AR.X Optics is free to download, with no in-app purchases.

### Do Viana 2 or AR.X Optics have ads?

Neither Viana 2 nor AR.X Optics shows ads.

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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.*