# Extrusion Guide vs Professional Maintenance Prep

The clearest difference is in-app purchases: Extrusion Guide at none against Professional Maintenance Prep's 9. Extrusion Guide also leads on iOS requirement (12.0 vs 15.1). On price, ads and device support there is nothing between them.

Both are free to download. Professional Maintenance Prep sells 9 in-app purchases, starting at $8.99 per 7 days. Extrusion Guide asks for nothing beyond the download.

## The numbers

| Metric | Extrusion Guide | Professional Maintenance Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/professional-maintenance-prep/id6754882293/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Monetization | — | Free with in-app purchases |
| Size | 6 MB | 51 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [A. Routsis Associates, Inc.](https://appshunter.io/developer/1392469925) | [YAUHEN BAHDANOVICH](https://appshunter.io/developer/1711932790) |

## What reviewers say

### Extrusion Guide

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Professional Maintenance Prep

[App page](https://appshunter.io/ios/app/professional-maintenance-prep/id6754882293)

Prepare for the Certified Maintenance & Reliability Professional exam with expert-crafted questions, realistic simulations, and detailed explanations. Track your progress and customize study plans to master essential knowledge and skills for career advancement.

**Highlights:** Expertly crafted practice questions, Realistic timed exam simulations, Detailed explanations for each question, Customizable study plans, Progress tracking and analytics, Regular content updates, Interactive learning tools

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mainten Weekly Full Access | $8.99 | per 7 days |
| Mainten Monthly Full Access | $24.99 | per month |
| Mainten Monthly Full Access | $24.99 | per month |
| Mainten Quarterly Full Access | $55.99 | per 3 months |
| Mainten Quarterly Full Access | $55.99 | per 3 months |
| Mainten Semiannual Full Access | $75.99 | per 6 months |
| Mainten Semiannual Full Access | $75.99 | per 6 months |
| Mainten Annual Full Access | $109.99 | per year |
| Mainten Annual Full Access | $109.99 | per year |


## Frequently asked questions

### Is Extrusion Guide free?

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

### Is Professional Maintenance Prep free?

Professional Maintenance Prep is free to download, with in-app purchases available.

### Do Extrusion Guide or Professional Maintenance Prep have ads?

Neither Extrusion Guide nor Professional Maintenance Prep shows ads.

---

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