# HydroTech Pocket Engineer vs ProcessChem

The clearest difference is iOS requirement: ProcessChem at 13.0 against HydroTech Pocket Engineer's 15.0. On price, update cadence, 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.

HydroTech Pocket Engineer ships an update monthly, ProcessChem every 6 weeks. The most recent releases landed on November 13, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | HydroTech Pocket Engineer | ProcessChem |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 weeks |
| Size | 3 MB | 407 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [michael schricker](https://appshunter.io/developer/1895753612) | [Ron Mangalam Jacob](https://appshunter.io/developer/6796077932) |

## What reviewers say

### HydroTech Pocket Engineer

[App page](https://appshunter.io/ios/app/hydrotech-pocket-engineer/id6764373443)

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

**In-app purchases:** none


### ProcessChem

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

**In-app purchases:** none


## Frequently asked questions

### Is HydroTech Pocket Engineer free?

HydroTech Pocket Engineer is free to download, with no in-app purchases.

### Is ProcessChem free?

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

### Do HydroTech Pocket Engineer or ProcessChem have ads?

Neither HydroTech Pocket Engineer nor ProcessChem shows ads.

### Which is updated more often, HydroTech Pocket Engineer or ProcessChem?

HydroTech Pocket Engineer ships an update monthly, and ProcessChem every 6 weeks. Most recently, HydroTech Pocket Engineer was updated on November 13, 2026 and ProcessChem on October 31, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*