# TopOpt Shape vs Shock Math Calculator

The clearest difference is iOS requirement: TopOpt Shape at 12.0 against Shock Math Calculator's 17.0. 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 | TopOpt Shape | Shock Math Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 5 MB | 5 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [DTU Mechanical Engineering](https://appshunter.io/developer/507453160) | [Gregory Manley](https://appshunter.io/developer/1650623300) |

## What reviewers say

### TopOpt Shape

[App page](https://appshunter.io/ios/app/topopt-shape/id1445661360)

**Features:** macOS Compatibility

**In-app purchases:** none


### Shock Math Calculator

[App page](https://appshunter.io/ios/app/shock-math-calculator/id6443923018)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is TopOpt Shape free?

TopOpt Shape is free to download, with no in-app purchases.

### Is Shock Math Calculator free?

Shock Math Calculator is free to download, with no in-app purchases.

### Do TopOpt Shape or Shock Math Calculator have ads?

Neither TopOpt Shape nor Shock Math Calculator 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.*