# Mechanical Dictionary vs Computer Science Dictionary

The clearest difference is ads: Computer Science Dictionary at none against Mechanical Dictionary's shown. Computer Science Dictionary also leads on monetization model (free vs free with in-app purchases) and rating (4.7 vs 4.4). On price, ratings volume, update cadence and in-app purchases there is nothing between them.

Both are free to download. Mechanical Dictionary sells 5 in-app purchases, starting at $1.99 per 7 days and Computer Science Dictionary sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Computer Science Dictionary holds the better App Store score, 4.7 against 4.4. Both are backed by a comparable volume of ratings — 5 and 3 respectively.

Mechanical Dictionary ships an update every 9 months, Computer Science Dictionary every 16 months. The most recent releases landed on June 6, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Mechanical Dictionary | Computer Science Dictionary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (5 ratings)](https://appshunter.io/ios/app/mechanical-dictionary-offline/id1480363529/reviews) | **[4.7 (3 ratings)](https://appshunter.io/ios/app/computer-science-dictionary/id6714465469/reviews)** |
| Number of ratings | **5** | 3 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 9 months** | Every 16 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 14 MB | 68 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Puju Dekivadiya](https://appshunter.io/developer/1289574712) | [Shital Gorasiya](https://appshunter.io/developer/1737199158) |

## What reviewers say

### Mechanical Dictionary

[App page](https://appshunter.io/ios/app/mechanical-dictionary-offline/id1480363529)

This app provides a comprehensive offline dictionary for mechanical engineering terms. It includes video lessons, tests, and expert coaching to enhance knowledge in the field. Features like search, audio pronunciation, and daily word learning are available.

**Highlights:** Offline access to thousands of terms, Search and bookmark functionality, Audio pronunciation of words, Daily 'Word of the Day' feature, Multiple choice quizzes, Customizable color themes

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Pro Plan | $1.99 | per 7 days |
| Monthly Pro Plan | $4.99 | per month |
| Yearly Pro Plan | $29.99 | per year |
| Remove Ads | $9.99 | one-time |
| Lifetime Access | $39.99 | one-time |


### Computer Science Dictionary

[App page](https://appshunter.io/ios/app/computer-science-dictionary/id6714465469)

This app offers a comprehensive offline dictionary for computer science and engineering students, featuring over 4,200 terms, formulas, historical insights, and quizzes. Explore computer history, save favorite terms, and test your knowledge with interactive challenges.

**Highlights:** 4,200+ Computer Engineering terms, Visual representations of formulas, Comprehensive computer history timeline, Challenging quizzes, Autoplay audio definitions, Community word contributions, Save favorite terms

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Purchase | $6.99 | one-time |


## Frequently asked questions

### Is Mechanical Dictionary free?

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

### Is Computer Science Dictionary free?

Computer Science Dictionary is free to download, with in-app purchases available.

### Which has better reviews, Mechanical Dictionary or Computer Science Dictionary?

Computer Science Dictionary is rated higher. Mechanical Dictionary averages 4.4 out of 5 from 5 ratings, while Computer Science Dictionary averages 4.7 from 3 ratings.

### Do Mechanical Dictionary or Computer Science Dictionary have ads?

Mechanical Dictionary shows ads; Computer Science Dictionary does not.

### Which is updated more often, Mechanical Dictionary or Computer Science Dictionary?

Mechanical Dictionary ships an update every 9 months, and Computer Science Dictionary every 16 months. Most recently, Mechanical Dictionary was updated on June 6, 2026 and Computer Science Dictionary on September 22, 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.*