# Crow Vocab Builder Version 2 vs Structural Dynamics Visualizer

The clearest difference is iOS requirement: Crow Vocab Builder Version 2 at 15.6 against Structural Dynamics Visualizer's 26.5. 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 | Crow Vocab Builder Version 2 | Structural Dynamics Visualizer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/structural-dynamics-visualizer/id6810331487/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | — |
| Monetization | — | Free |
| Size | 539 MB | 8 MB |
| Requires iOS | **15.6** | 26.5 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Language Conservancy, Inc](https://appshunter.io/developer/1063881431) | [MICHAEL PATRICK BERRY](https://appshunter.io/developer/6810331489) |

## What reviewers say

### Crow Vocab Builder Version 2

[App page](https://appshunter.io/ios/app/crow-vocab-builder-version-2/id6477953721)

**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 Crow Vocab Builder Version 2 free?

Crow Vocab Builder Version 2 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.

### Do Crow Vocab Builder Version 2 or Structural Dynamics Visualizer have ads?

Neither Crow Vocab Builder Version 2 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.*