# Learn Operating System vs Computer Science Dictionary

The clearest difference is monetization model: Computer Science Dictionary at free against Learn Operating System's free with in-app purchases. Computer Science Dictionary also leads on ratings volume (3 vs 1) and iOS requirement (13.0 vs 15.1). Learn Operating System's advantage is rating (5.0 vs 4.7). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Learn Operating System sells 1 one-off in-app purchase and Computer Science Dictionary sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Learn Operating System holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.

Both ship on a similar rhythm, roughly every 16 months. The most recent releases landed on June 1, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | Learn Operating System | Computer Science Dictionary |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/learn-operating-system/id6446438155/reviews)** | [4.7 (3 ratings)](https://appshunter.io/ios/app/computer-science-dictionary/id6714465469/reviews) |
| Number of ratings | 1 | **3** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | Every 16 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 29 MB | 68 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ghumman Tech LLC](https://appshunter.io/developer/1671347750) | [Shital Gorasiya](https://appshunter.io/developer/1737199158) |

## What reviewers say

### Learn Operating System

[App page](https://appshunter.io/ios/app/learn-operating-system/id6446438155)

Master operating system concepts through concise study sessions and interactive quizzes. This app offers audio pronunciation of technical terms and bookmarking for flashcards and questions, aiding efficient learning and progress tracking.

**Highlights:** Audio pronunciation of OS terms, Text-to-Speech engine, Interactive quizzes, Study mode, Bookmarking flashcards and questions, Progress indicators, Progress visualization

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $9.99 | 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 Learn Operating System free?

Learn Operating System 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, Learn Operating System or Computer Science Dictionary?

Learn Operating System is rated higher. Learn Operating System averages 5.0 out of 5 from 1 ratings, while Computer Science Dictionary averages 4.7 from 3 ratings.

### Do Learn Operating System or Computer Science Dictionary have ads?

Neither Learn Operating System nor Computer Science Dictionary shows ads.

### Which is updated more often, Learn Operating System or Computer Science Dictionary?

Learn Operating System ships an update every 16 months, and Computer Science Dictionary every 16 months. Most recently, Learn Operating System was updated on June 1, 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.*