# Computer Science Dictionary vs ShellRef

The clearest difference is price: Computer Science Dictionary at Free against ShellRef's $0.99. Computer Science Dictionary also leads on ratings volume (3 vs 1) and iOS requirement (13.0 vs 17.6). ShellRef's advantage is in-app purchases (none vs 1) and update cadence (every 3 weeks vs every 16 months). On ads and device support there is nothing between them.

Computer Science Dictionary is free to download; ShellRef costs $0.99 up front. Computer Science Dictionary sells 1 one-off in-app purchase. ShellRef asks for nothing beyond the download.

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

Computer Science Dictionary ships an update every 16 months, ShellRef every 3 weeks. The most recent releases landed on September 22, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Computer Science Dictionary | ShellRef |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | [4.7 (3 ratings)](https://appshunter.io/ios/app/computer-science-dictionary/id6714465469/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/shellref/id6759814118/reviews)** |
| Number of ratings | **3** | 1 |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 3 weeks** |
| Monetization | **Free** | Paid |
| Size | 68 MB | 19 MB |
| Requires iOS | **13.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Shital Gorasiya](https://appshunter.io/developer/1737199158) | [Andrew Bacon](https://appshunter.io/developer/1817531814) |

## What reviewers say

### 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 |


### ShellRef

[App page](https://appshunter.io/ios/app/shellref/id6759814118)

This app provides an offline reference for Bash, Zsh, and terminal editors, mimicking a retro technical manual. It's ideal for quickly looking up commands, syntax, and scripting practices without needing an internet connection. Features include search, bookmarks, and customizable display themes.

**Highlights:** Offline Bash and Zsh reference, Terminal editor guides (Nano, Vim, Emacs), Quick command lookup, Searchable content, Customizable themes, Adjustable text size, Bookmarks

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Computer Science Dictionary free?

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

### Is ShellRef free?

ShellRef costs $0.99, with no in-app purchases.

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

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

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

Neither Computer Science Dictionary nor ShellRef shows ads.

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

Computer Science Dictionary ships an update every 16 months, and ShellRef every 3 weeks. Most recently, Computer Science Dictionary was updated on September 22, 2026 and ShellRef on October 2, 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.*