# Mechanical Dictionary Pro vs Equation Encyclopedia

The clearest difference is in-app purchases: Mechanical Dictionary Pro at none against Equation Encyclopedia's 9. Mechanical Dictionary Pro also leads on ads (none vs shown) and iOS requirement (9.0 vs 15.0). On price and device support there is nothing between them.

Both are free to download. Equation Encyclopedia sells 9 in-app purchases, starting at $6.99 per month. Mechanical Dictionary Pro asks for nothing beyond the download.

## The numbers

| Metric | Mechanical Dictionary Pro | Equation Encyclopedia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/mechanical-dictionary-pro/id1495131031/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Every 4 days |
| Monetization | Free | — |
| Size | 15 MB | 451 MB |
| Requires iOS | **9.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Donik Ariyanto](https://appshunter.io/developer/1325008963) | [SAMUEL MOYOSORE O ADEYIGA](https://appshunter.io/developer/1874179107) |

## What reviewers say

### Mechanical Dictionary Pro

[App page](https://appshunter.io/ios/app/mechanical-dictionary-pro/id1495131031)

Access a vast offline database of mechanical engineering terms and definitions. This app offers a search function, daily words, and quizzes to enhance your learning. It's designed for anyone needing quick access to mechanical vocabulary without an internet connection.

**Highlights:** Full offline access, Tens of thousands of terms, Search functionality, Bookmark favorite terms, Word of the day, Mechanical terms quiz

**Features:** macOS Compatibility

**In-app purchases:** none


### Equation Encyclopedia

[App page](https://appshunter.io/ios/app/equation-encyclopedia/id6758647681)

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

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Plus Monthly | $6.99 | per month |
| Pro Monthly | $10.99 | per month |
| Ultra Monthly | $17.99 | per month |
| Plus Yearly | $49.99 | per year |
| Pro Yearly | $99.99 | per year |
| Ultra Yearly | $149.99 | per year |
| 10 Energy | $0.99 | one-time |
| 30 Energy | $2.99 | one-time |
| 100 Energy | $8.99 | one-time |


## Frequently asked questions

### Is Mechanical Dictionary Pro free?

Mechanical Dictionary Pro is free to download, with no in-app purchases.

### Is Equation Encyclopedia free?

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

### Do Mechanical Dictionary Pro or Equation Encyclopedia have ads?

Equation Encyclopedia shows ads; Mechanical Dictionary Pro does not.

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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.*