# TIMMS Site Viewer vs ALIGN RTK

The clearest difference is iOS requirement: TIMMS Site Viewer at 8.1 against ALIGN RTK's 12.0. On price, ads, in-app purchases and device support 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 | TIMMS Site Viewer | ALIGN RTK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 6 months | — |
| Size | 78 MB | 21 MB |
| Requires iOS | **8.1** | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Trimble Inc.](https://appshunter.io/developer/322561665) | [Align Corporation Limited](https://appshunter.io/developer/485623955) |

## 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


### ALIGN RTK

[App page](https://appshunter.io/ios/app/align-rtk-1/id6480390141)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is TIMMS Site Viewer free?

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

### Is ALIGN RTK free?

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

### Do TIMMS Site Viewer or ALIGN RTK have ads?

Neither TIMMS Site Viewer nor ALIGN RTK 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.*