# Instrument Tech School vs Extrusion Guide

The clearest difference is iOS requirement: Extrusion Guide at 12.0 against Instrument Tech School's 16.6. On price, ads, in-app purchases and device support 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 | Instrument Tech School | Extrusion Guide |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Fortnightly | — |
| Size | 46 MB | 6 MB |
| Requires iOS | 16.6 | **12.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Javier Zuazua](https://appshunter.io/developer/1782023473) | [A. Routsis Associates, Inc.](https://appshunter.io/developer/1392469925) |

## What reviewers say

### Instrument Tech School

[App page](https://appshunter.io/ios/app/instrument-tech-school/id6738712153)

**In-app purchases:** none


### Extrusion Guide

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Instrument Tech School free?

Instrument Tech School is free to download, with no in-app purchases.

### Is Extrusion Guide free?

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

### Do Instrument Tech School or Extrusion Guide have ads?

Neither Instrument Tech School 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.*