# Thermo Dynamics Calc vs Process Engineer Calc

The clearest difference is in-app purchases: Process Engineer Calc at none against Thermo Dynamics Calc's 1. Thermo Dynamics Calc's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Thermo Dynamics Calc sells 1 one-off in-app purchase. Process Engineer Calc asks for nothing beyond the download.

## The numbers

| Metric | Thermo Dynamics Calc | Process Engineer Calc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | — | Every 10 days |
| Size | 41 MB | 11 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shraddhaben Parmar](https://appshunter.io/developer/1889769325) | [冯泰 蔡](https://appshunter.io/developer/1896641064) |

## What reviewers say

### Thermo Dynamics Calc

[App page](https://appshunter.io/ios/app/thermo-dynamics-calc/id6766844933)

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

**In-app purchases (1)**

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


### 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 Thermo Dynamics Calc free?

Thermo Dynamics Calc is free to download, with in-app purchases available.

### Is Process Engineer Calc free?

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

### Do Thermo Dynamics Calc or Process Engineer Calc have ads?

Neither Thermo Dynamics Calc 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.*