# QuakeSafe Dam vs Viewra 3D

The clearest difference is in-app purchases: QuakeSafe Dam at none against Viewra 3D's 3. Viewra 3D's advantage is device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

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

## The numbers

| Metric | QuakeSafe Dam | Viewra 3D |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/quakesafe-dam/id6739592421/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 4 months |
| Monetization | Free | — |
| Size | 65 MB | 152 MB |
| Requires iOS | **18.2** | 18.6 |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [John Nguyen](https://appshunter.io/developer/1573137293) | [Shenzhen Seize Times E-Commerce Co., Ltd.](https://appshunter.io/developer/368397197) |

## What reviewers say

### QuakeSafe Dam

[App page](https://appshunter.io/ios/app/quakesafe-dam/id6739592421)

This app offers real-time monitoring of California dams and assesses their earthquake vulnerability. It provides engineers, residents, and safety planners with accurate data on seismic events and dam conditions to ensure preparedness.

**Highlights:** Interactive map of dams and seismic events, Detailed dam profiles, Seismic impact assessments, Customizable alerts, Reliable data sources (USGS, NID)

**Features:** macOS Compatibility

**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 QuakeSafe Dam free?

QuakeSafe Dam 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 QuakeSafe Dam or Viewra 3D have ads?

Neither QuakeSafe Dam nor Viewra 3D 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.*