# REO Mechanical Engineering vs English Mechanical Engineering

The clearest difference is in-app purchases: REO Mechanical Engineering at none against English Mechanical Engineering's 6. REO Mechanical Engineering also leads on ads (none vs shown). English Mechanical Engineering's advantage is update cadence (every 3 weeks vs every 21 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. English Mechanical Engineering sells 6 in-app purchases, starting at $8.49 per 7 days. REO Mechanical Engineering asks for nothing beyond the download.

REO Mechanical Engineering ships an update every 21 months, English Mechanical Engineering every 3 weeks. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | REO Mechanical Engineering | English Mechanical Engineering |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (18 ratings)](https://appshunter.io/ios/app/english-mechanical-engineering/id6755089323/reviews)** |
| Number of ratings | — | **18** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Every 3 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 452 MB | 51 MB |
| Requires iOS | **14.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | +4 |
| Developer | [Rex Banggawan](https://appshunter.io/developer/1516403954) | [Nelly Latypova](https://appshunter.io/developer/1150816403) |

## 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


### English Mechanical Engineering

[App page](https://appshunter.io/ios/app/english-mechanical-engineering/id6755089323)

Master technical English vocabulary for mechanical engineering with flashcards and practice modes. Improve communication, excel in studies, and advance your career with this specialized learning tool.

**Highlights:** Technical vocabulary flashcards, Eight practice modes, Progress tracking and statistics, Mark learned/unlearned words, User-friendly design, Real-world application focus

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Engineering Vocabulary Pro | $8.49 | per 7 days |
| Mechanical Lexicon Pro | $8.49 | per month |
| Mechanical Lexicon Pro | $9.49 | per month |
| Mechanical Vocabulary Pro | $29.99 | per 3 months |
| Pro Mechanical Terminology | $34.99 | per year |
| Pro Mechanical Terminology | $34.99 | per year |


## Frequently asked questions

### Is REO Mechanical Engineering free?

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

### Is English Mechanical Engineering free?

English Mechanical Engineering is free to download, with in-app purchases available.

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

English Mechanical Engineering shows ads; REO Mechanical Engineering does not.

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

REO Mechanical Engineering ships an update every 21 months, and English Mechanical Engineering every 3 weeks. Most recently, REO Mechanical Engineering was updated on November 3, 2026 and English Mechanical Engineering on October 30, 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.*