# Castle Model Viewer vs T

The clearest difference is monetization model: Castle Model Viewer at free against T's freemium. Castle Model Viewer also leads on iOS requirement (13.0 vs 16.0). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for Castle Model Viewer against 5.0 for T. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

## The numbers

| Metric | Castle Model Viewer | T |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/castle-model-viewer/id6752208775/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/t-sketch/id6760368862/reviews) |
| Number of ratings | **2** | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Monetization | **Free** | Freemium |
| Size | 72 MB | 2 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [MICHALIS KAMBURELIS](https://appshunter.io/developer/1838215378) | [Maxim Kuzkin](https://appshunter.io/developer/1343530042) |

## What reviewers say

### Castle Model Viewer

[App page](https://appshunter.io/ios/app/castle-model-viewer/id6752208775)

View and interact with a wide range of 2D and 3D model formats. Explore models, play animations, and save screenshots. Supports various file types including glTF, X3D, and OBJ, with options to open ZIP archives containing models and textures.

**Highlights:** Supports glTF, X3D, VRML, IFC, Spine JSON, and more, Open ZIP files with models and textures, Change navigation types (walk, fly, examine, 2D), Play animations, Save screenshots, Display scene statistics

**Features:** macOS Compatibility

**In-app purchases:** none


### T

[App page](https://appshunter.io/ios/app/t-sketch/id6760368862)

An infinite canvas app for sketching, drawing, and real-time team collaboration. Brainstorm, design, and present ideas visually on a shared space accessible from multiple devices.

**Highlights:** Infinite canvas for unlimited drawing space, Natural drawing with pressure and tilt support, Real-time collaboration with live cursors, Share sketches via link for web or app access, Create presentations directly from your canvas, Export sketches as PNG images or archives

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Castle Model Viewer free?

Castle Model Viewer is free to download, with no in-app purchases.

### Is T free?

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

### Which has better reviews, Castle Model Viewer or T?

Castle Model Viewer and T are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do Castle Model Viewer or T have ads?

Neither Castle Model Viewer nor T shows ads.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*