# HAZOP vs Process Engineer Calc

The clearest difference is device support: HAZOP at 3 against Process Engineer Calc's 1. HAZOP also leads on iOS requirement (12.0 vs 17.0). On price, ads and in-app purchases 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 | HAZOP | Process Engineer Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | — | Every 10 days |
| Size | 39 MB | 11 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [GAMAL ABDELNASER GABR GABR](https://appshunter.io/developer/1646549757) | [冯泰 蔡](https://appshunter.io/developer/1896641064) |

## What reviewers say

### HAZOP

[App page](https://appshunter.io/ios/app/hazop-lopa/id6748004589)

**Features:** macOS Compatibility

**In-app purchases:** none


### Process Engineer Calc

[App page](https://appshunter.io/ios/app/process-engineer-calc-lms/id6774295442)

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

**In-app purchases:** none


## Frequently asked questions

### Is HAZOP free?

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

### Is Process Engineer Calc free?

Process Engineer Calc is free to download, with no in-app purchases.

### Do HAZOP or Process Engineer Calc have ads?

Neither HAZOP nor Process Engineer Calc 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.*