# Engineering Calculator vs Smart Material Calculator

The clearest difference is price: Smart Material Calculator at Free against Engineering Calculator's $0.99. Smart Material Calculator also leads on iOS requirement (13.0 vs 15.1). Engineering Calculator's advantage is in-app purchases (none vs 1). On ads and device support there is nothing between them.

Smart Material Calculator is free to download; Engineering Calculator costs $0.99 up front. Smart Material Calculator sells 1 one-off in-app purchase. Engineering Calculator asks for nothing beyond the download.

## The numbers

| Metric | Engineering Calculator | Smart Material Calculator |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Size | 17 MB | 61 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | +4 |
| Developer | [Yasin Demir](https://appshunter.io/developer/1838444361) | [Sachinbhai Surani](https://appshunter.io/developer/1838685550) |

## What reviewers say

### Engineering Calculator

[App page](https://appshunter.io/ios/app/engineering-calculator/id6761010498)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Smart Material Calculator

[App page](https://appshunter.io/ios/app/smart-material-calculator/id6773222839)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime premium | $12.99 | one-time |


## Frequently asked questions

### Is Engineering Calculator free?

Engineering Calculator costs $0.99, with no in-app purchases.

### Is Smart Material Calculator free?

Smart Material Calculator is free to download, with in-app purchases available.

### Do Engineering Calculator or Smart Material Calculator have ads?

Neither Engineering Calculator nor Smart Material 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.*