# REO Mechanical Engineering vs QuaLean

The clearest difference is in-app purchases: REO Mechanical Engineering at none against QuaLean's 1. REO Mechanical Engineering also leads on device support (3 vs 1) and iOS requirement (14.0 vs 16.4). QuaLean's advantage is update cadence (every 5 months vs every 21 months). On price and ads there is nothing between them.

Both are free to download. QuaLean sells 1 one-off in-app purchase. REO Mechanical Engineering asks for nothing beyond the download.

REO Mechanical Engineering ships an update every 21 months, QuaLean every 5 months. The most recent releases landed on September 17, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | REO Mechanical Engineering | QuaLean |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 21 months | **Every 5 months** |
| Size | 452 MB | 85 MB |
| Requires iOS | **14.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 17+ |
| Developer | [Rex Banggawan](https://appshunter.io/developer/1516403954) | [TagMango Inc](https://appshunter.io/developer/1611765353) |

## What reviewers say

### REO Mechanical Engineering

[App page](https://appshunter.io/ios/app/reo-mechanical-engineering/id1616497471)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### QuaLean

[App page](https://appshunter.io/ios/app/qualean/id6746635737)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Automotive Quality System | $119.99 | one-time |


## Frequently asked questions

### Is REO Mechanical Engineering free?

REO Mechanical Engineering is free to download, with no in-app purchases.

### Is QuaLean free?

QuaLean is free to download, with in-app purchases available.

### Do REO Mechanical Engineering or QuaLean have ads?

Neither REO Mechanical Engineering nor QuaLean shows ads.

### Which is updated more often, REO Mechanical Engineering or QuaLean?

REO Mechanical Engineering ships an update every 21 months, and QuaLean every 5 months. Most recently, REO Mechanical Engineering was updated on September 17, 2026 and QuaLean 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.*