# Control Systems Engineering vs Extrusion Guide

The clearest difference is in-app purchases: Extrusion Guide at none against Control Systems Engineering's 6. Extrusion Guide also leads on device support (3 vs 1) and iOS requirement (12.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. Control Systems Engineering sells 6 in-app purchases, starting at $9.99 per month. Extrusion Guide asks for nothing beyond the download.

## The numbers

| Metric | Control Systems Engineering | Extrusion Guide |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Size | 18 MB | 6 MB |
| Requires iOS | 17.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Forwa Elade Wunde](https://appshunter.io/developer/1685241344) | [A. Routsis Associates, Inc.](https://appshunter.io/developer/1392469925) |

## What reviewers say

### Control Systems Engineering

[App page](https://appshunter.io/ios/app/control-systems-engineering/id6739731886)

**Features:** macOS Compatibility

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month | $9.99 | per month |
| 6 Months | $19.99 | per 6 months |
| 1 Year | $29.99 | per year |
| 1500 | $0.99 | one-time |
| 3500 | $1.99 | one-time |
| 9000 | $3.99 | one-time |


### Extrusion Guide

[App page](https://appshunter.io/ios/app/extrusion-guide/id6744205048)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Control Systems Engineering free?

Control Systems Engineering is free to download, with in-app purchases available.

### Is Extrusion Guide free?

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

### Do Control Systems Engineering or Extrusion Guide have ads?

Neither Control Systems Engineering nor Extrusion Guide 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.*