# TIMMS Site Viewer vs Viewra 3D

The clearest difference is in-app purchases: TIMMS Site Viewer at none against Viewra 3D's 3. TIMMS Site Viewer also leads on iOS requirement (8.1 vs 18.6). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Viewra 3D sells 3 in-app purchases, starting at $2.99 per month. TIMMS Site Viewer asks for nothing beyond the download.

TIMMS Site Viewer ships an update every 6 months, Viewra 3D every 4 months. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | TIMMS Site Viewer | Viewra 3D |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 4 months** |
| Size | 78 MB | 152 MB |
| Requires iOS | **8.1** | 18.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Trimble Inc.](https://appshunter.io/developer/322561665) | [Shenzhen Seize Times E-Commerce Co., Ltd.](https://appshunter.io/developer/368397197) |

## What reviewers say

### TIMMS Site Viewer

[App page](https://appshunter.io/ios/app/timms-site-viewer/id1109956778)

**Features:** Vision Pro support

**In-app purchases:** none


### Viewra 3D

[App page](https://appshunter.io/ios/app/viewra-3d/id6758283083)

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Viewra 3D Pro (1 Month) | $2.99 | per month |
| Viewra 3D Pro (1 Year) | $29.99 | per year |
| Viewra 3D Pro (Lifetime) | $79.99 | one-time |


## Frequently asked questions

### Is TIMMS Site Viewer free?

TIMMS Site Viewer is free to download, with no in-app purchases.

### Is Viewra 3D free?

Viewra 3D is free to download, with in-app purchases available.

### Do TIMMS Site Viewer or Viewra 3D have ads?

Neither TIMMS Site Viewer nor Viewra 3D shows ads.

### Which is updated more often, TIMMS Site Viewer or Viewra 3D?

TIMMS Site Viewer ships an update every 6 months, and Viewra 3D every 4 months. Most recently, TIMMS Site Viewer was updated on October 19, 2026 and Viewra 3D on October 12, 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.*