# Unit Converter and Calculator. vs ProcessChem

The clearest difference is in-app purchases: ProcessChem at none against Unit Converter and Calculator.'s 1. ProcessChem also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.0). On price, update cadence and device support there is nothing between them.

Both are free to download. Unit Converter and Calculator. sells 1 one-off in-app purchase. ProcessChem asks for nothing beyond the download.

Unit Converter and Calculator. ships an update monthly, ProcessChem every 6 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Unit Converter and Calculator. | ProcessChem |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (83 ratings)](https://appshunter.io/ios/app/unit-converter-and-calculator/id1559358634/reviews)** | — |
| Number of ratings | **83** | — |
| Positive reviews | 28.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 6 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 19 MB | 407 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Kemal Bakacak](https://appshunter.io/developer/1475963902) | [Ron Mangalam Jacob](https://appshunter.io/developer/6796077932) |

## What reviewers say

### Unit Converter and Calculator.

[App page](https://appshunter.io/ios/app/unit-converter-and-calculator/id1559358634)

Effortlessly perform a vast array of unit conversions with this comprehensive mobile application. It offers real-time, accurate results across over 70 categories and 1450 units, featuring a user-friendly design and offline access.

**Highlights:** Real-time conversions, Over 70 categories, More than 1450 units, Offline access, User-friendly design, Customizable settings, Dark mode support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium, All Calculation Units | $2.99 | one-time |


### ProcessChem

[App page](https://appshunter.io/ios/app/processchem/id6796077930)

**In-app purchases:** none


## Frequently asked questions

### Is Unit Converter and Calculator. free?

Unit Converter and Calculator. is free to download, with in-app purchases available.

### Is ProcessChem free?

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

### Do Unit Converter and Calculator. or ProcessChem have ads?

Unit Converter and Calculator. shows ads; ProcessChem does not.

### Which is updated more often, Unit Converter and Calculator. or ProcessChem?

Unit Converter and Calculator. ships an update monthly, and ProcessChem every 6 weeks. Most recently, Unit Converter and Calculator. was updated on October 27, 2026 and ProcessChem on October 24, 2026.

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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.*