# Is That an Earthquake? vs Structural Dynamics Visualizer

The clearest difference is iOS requirement: Is That an Earthquake? at 13.0 against Structural Dynamics Visualizer's 26.5. 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 Is That an Earthquake? against 5.0 for Structural Dynamics Visualizer. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

## The numbers

| Metric | Is That an Earthquake? | Structural Dynamics Visualizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/is-that-an-earthquake/id892584539/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/structural-dynamics-visualizer/id6810331487/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | — |
| Monetization | Free | Free |
| Size | 126 MB | 8 MB |
| Requires iOS | **13.0** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Ministry of Education](https://appshunter.io/developer/507340102) | [MICHAEL PATRICK BERRY](https://appshunter.io/developer/6810331489) |

## What reviewers say

### Is That an Earthquake?

[App page](https://appshunter.io/ios/app/is-that-an-earthquake/id892584539)

This interactive digital book tells the story of a child's anxiety about potential earthquakes and the real event. It features read-to-me, read-it-myself, and narration recording options, along with an earthquake safety guide.

**Highlights:** Swipe-to-Read™, Touch-to-Hear™, Touch-to-Spell™, Read-to-me and read-it-yourself, Record narration, Color illustrations, Earthquake safety guide

**Features:** macOS Compatibility

**In-app purchases:** none


### Structural Dynamics Visualizer

[App page](https://appshunter.io/ios/app/structural-dynamics-visualizer/id6810331487)

Explore structural vibrations with this interactive educational tool. Visualize free and forced vibrations, mode shapes, and earthquake responses using animated models and synchronized plots. Adjust system parameters to see immediate effects on structural behavior.

**Highlights:** Free vibration analysis, Forced vibration and resonance, SDOF and MDOF models, Mode shape visualization, Earthquake response simulation, Interactive parameter adjustment, Animated structural deformation

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Is That an Earthquake? free?

Is That an Earthquake? is free to download, with no in-app purchases.

### Is Structural Dynamics Visualizer free?

Structural Dynamics Visualizer is free to download, with no in-app purchases.

### Which has better reviews, Is That an Earthquake? or Structural Dynamics Visualizer?

Is That an Earthquake? and Structural Dynamics Visualizer are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do Is That an Earthquake? or Structural Dynamics Visualizer have ads?

Neither Is That an Earthquake? nor Structural Dynamics Visualizer 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.*