# 3D Viewer by Chief Architect vs On

The clearest difference is rating: 3D Viewer by Chief Architect at 3.7 against On's 1.0. 3D Viewer by Chief Architect also leads on ratings volume (527 vs 1). On's advantage is iOS requirement (11 vs 16.0). On price, update cadence, 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.

3D Viewer by Chief Architect holds the better App Store score, 3.7 against 1.0. That said, the two scores are not equally well evidenced: 3D Viewer by Chief Architect has 527 ratings behind it against 1, so its average is the more settled of the two.

3D Viewer by Chief Architect ships an update every 4 months, On every 3 months. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | 3D Viewer by Chief Architect | On |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.7 (527 ratings)](https://appshunter.io/ios/app/3d-viewer-by-chief-architect/id1083656847/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/on-track-gps-live/id1269018607/reviews) |
| Number of ratings | **527** | 1 |
| Positive reviews | 31.1% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Free | Free |
| Size | 152 MB | 32 MB |
| Requires iOS | 16.0 | **11** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Chief Architect](https://appshunter.io/developer/520677645) | [M2M DATA GROUP LIMITED](https://appshunter.io/developer/1425847555) |

## What reviewers say

### 3D Viewer by Chief Architect

[App page](https://appshunter.io/ios/app/3d-viewer-by-chief-architect/id1083656847)

Explore 3D architectural models in virtual reality. Navigate through home designs with intuitive controls, experiencing them before construction. Ideal for professionals to share immersive project previews with clients.

**Highlights:** Virtual reality navigation, Walk and fly through designs, Exterior, room, and floor plan views, Sojourn 3D navigation tools, Gyro camera for free form viewing, Background camera control

**In-app purchases:** none

**What reviewers like**

- 👍 Great bonus item for clients
- 🚀 Works fine once
- ⭐ Low key elite
- 👍 Very functional
- 👍 Works well to keep clients up to date

**What reviewers complain about**

- 🐛 Cannot view plan on iPad
- 🐛 Keeps crashing
- 🐛 Cannot view link
- 🐛 Images on iPad don't match desktop
- 🐛 Worst app ever

**Reported bugs**

- Cannot open zipped files
- Difficult to import models from Dropbox/OneDrive
- VR mode spins around uncontrollably

**Requested features**

- Support for OneDrive
- AR in full scale
- Ability to make handwritten/design notes on the model
- Markup and add text comments
- Floor plan view that mimics desktop, control layers, see notes


### On

[App page](https://appshunter.io/ios/app/on-track-gps-live/id1269018607)

Access your GPS tracking account to view real-time asset locations and historical playback. Manage your asset information directly within the application.

**Highlights:** Log into GPS tracking account, Modify asset information, View real-time asset location, Historical playback

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is 3D Viewer by Chief Architect free?

3D Viewer by Chief Architect is free to download, with no in-app purchases.

### Is On free?

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

### Which has better reviews, 3D Viewer by Chief Architect or On?

3D Viewer by Chief Architect is rated higher. 3D Viewer by Chief Architect averages 3.7 out of 5 from 527 ratings, while On averages 1.0 from 1 ratings.

### Do 3D Viewer by Chief Architect or On have ads?

Neither 3D Viewer by Chief Architect nor On shows ads.

### Which is updated more often, 3D Viewer by Chief Architect or On?

3D Viewer by Chief Architect ships an update every 4 months, and On every 3 months. Most recently, 3D Viewer by Chief Architect was updated on October 21, 2026 and On on October 24, 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.*