# Mechanical Dictionary vs CS++ AP CSA

The clearest difference is rating: CS++ AP CSA at 5.0 against Mechanical Dictionary's 4.4. CS++ AP CSA also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 9 months). On price, review sentiment, ratings volume and in-app purchases there is nothing between them.

Both are free to download. Mechanical Dictionary sells 4 in-app purchases, starting at $1.99 per 7 days and CS++ AP CSA sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

CS++ AP CSA holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 5 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

Mechanical Dictionary ships an update every 9 months, CS++ AP CSA every 3 weeks. The most recent releases landed on November 3, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | Mechanical Dictionary | CS++ AP CSA |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.4 (5 ratings)](https://appshunter.io/ios/app/mechanical-dictionary-offline/id1480363529/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cs-plus-plus-ap-csa/id6763950108/reviews)** |
| Number of ratings | **5** | 2 |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 9 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 14 MB | 57 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Puju Dekivadiya](https://appshunter.io/developer/1289574712) | [Kevin Hare](https://appshunter.io/developer/1343264116) |

## 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 (4)**

| 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 |
| Lifetime Access | $39.99 | one-time |


### CS++ AP CSA

[App page](https://appshunter.io/ios/app/cs-plus-plus-ap-csa/id6763950108)

This app provides a comprehensive offline course for AP Computer Science A, featuring interactive coding challenges and practice questions. It covers all 11 units of the College Board curriculum with explanations and common error callouts. Progress is saved locally, ensuring privacy and accessibility without an internet connection.

**Highlights:** 11 AP CSA units covered, Offline Java runtime, Hundreds of practice questions, 50+ inline coding challenges, Topic-by-topic explanations, Progress saved on-device, No account or tracking

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Full AP CSA Course | $9.99 | one-time |


## Frequently asked questions

### Is Mechanical Dictionary free?

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

### Is CS++ AP CSA free?

CS++ AP CSA is free to download, with in-app purchases available.

### Which has better reviews, Mechanical Dictionary or CS++ AP CSA?

CS++ AP CSA is rated higher. Mechanical Dictionary averages 4.4 out of 5 from 5 ratings, while CS++ AP CSA averages 5.0 from 2 ratings.

### Do Mechanical Dictionary or CS++ AP CSA have ads?

Mechanical Dictionary shows ads; CS++ AP CSA does not.

### Which is updated more often, Mechanical Dictionary or CS++ AP CSA?

Mechanical Dictionary ships an update every 9 months, and CS++ AP CSA every 3 weeks. Most recently, Mechanical Dictionary was updated on November 3, 2026 and CS++ AP CSA on November 9, 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.*