# iPhysics vs Twin

The clearest difference is rating: iPhysics at 5.0 against Twin's 4.0. iPhysics also leads on in-app purchases (none vs 2) and iOS requirement (13.0 vs 17.0). Twin's advantage is update cadence (fortnightly vs monthly) and ratings volume (4 vs 1). On price, ads and device support there is nothing between them.

Both are free to download. Twin sells 2 in-app purchases, starting at $1.99 per month. iPhysics asks for nothing beyond the download.

iPhysics holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively.

iPhysics ships an update monthly, Twin fortnightly. The most recent releases landed on October 16, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | iPhysics | Twin |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/iphysics/id1560181130/reviews)** | [4.0 (4 ratings)](https://appshunter.io/ios/app/twin-scans-for-passthrough/id6499172465/reviews) |
| Number of ratings | 1 | **4** |
| Positive reviews | — | 75.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 10 MB | 16 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Vision Pro |
| Age rating | 4+ | 4+ |
| Developer | [machineering GmbH & Co. KG](https://appshunter.io/developer/1539918946) | [1984 LLC](https://appshunter.io/developer/1089433935) |

## What reviewers say

### iPhysics

[App page](https://appshunter.io/ios/app/iphysics/id1560181130)

Visualize complex machines and robots in 3D. This application provides real-time viewing of physics-based simulations created with the iPhysics software.

**Highlights:** 3D model visualization, Real-time simulation viewing, Physics-based simulations, Machine and robot simulation, iPhysics software integration

**Features:** macOS Compatibility

**In-app purchases:** none


### Twin

[App page](https://appshunter.io/ios/app/twin-scans-for-passthrough/id6499172465)

Create 3D digital twins of your physical items using your iPhone or iPad. Seamlessly bring these models into your Apple Vision Pro environment for immersive experiences. Explore your creations with advanced filters and organization tools.

**Highlights:** Create 3D models using photogrammetry, View models in visionOS environments, Apply filters and colorways to models, Automatic syncing between Apple devices, Organize models with search and sorting, Browse and place models on Apple Vision Pro

**Features:** Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $1.99 | per month |
| Pro Annual | $9.99 | per year |


## Frequently asked questions

### Is iPhysics free?

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

### Is Twin free?

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

### Which has better reviews, iPhysics or Twin?

iPhysics is rated higher. iPhysics averages 5.0 out of 5 from 1 ratings, while Twin averages 4.0 from 4 ratings.

### Do iPhysics or Twin have ads?

Neither iPhysics nor Twin shows ads.

### Which is updated more often, iPhysics or Twin?

iPhysics ships an update monthly, and Twin fortnightly. Most recently, iPhysics was updated on October 16, 2026 and Twin on October 5, 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.*