Python Data Structures & Algo vs ShellRef
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Python Data Structures & Algo
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Master Data Structures and Algorithms using Python. Learn Data Structure and Algorithm concepts with our comprehensive tutorial app. Perfect for beginners starting their coding journey and developers preparing for technical interviews. All examples use Python. Available in 7 Languages: • English, French, German, Italian, Portuguese, Russian, and Spanish — study in your native language! What You'll Learn: • Algorithm fundamentals and complexity analysis • Arrays, strings, linked lists, stacks, and queues • Hash tables, sets, trees, and graphs • Sorting algorithms: insertion, merge, and quicksort • Graph algorithms: BFS, DFS, Dijkstra's, and Prim's • Dynamic programming, greedy algorithms, and backtracking Complete Learning Experience: • 23 structured chapters from beginner to advanced • Step-by-step tutorials with clear explanations • Complete, runnable Python code examples • Interactive quiz questions to test your knowledge User-Friendly Features: • Dark and light theme options • Clean, distraction-free interface Perfect for: • Complete beginners with no prior DSA experience • Students preparing for coding interviews • Computer science students learning algorithms • Developers strengthening their problem-solving skills • Self-learners building strong programming foundations Start your DSA mastery journey today - from basic concepts to interview-ready problem solving!
ShellRef
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.
- Offline Bash and Zsh reference
- Terminal editor guides (Nano, Vim, Emacs)
- Quick command lookup
- Searchable content
- Customizable themes
- Adjustable text size
- Bookmarks
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ShellRef is an offline reference for Bash, Zsh, and terminal editors, presented as a focused CRT console reference manual. It’s designed for quick lookup while you work—whether you’re writing your first shell script, checking quoting rules, reviewing Zsh behavior, or trying to remember a Vim command without opening a browser. The app includes reference sections for: • Bash fundamentals, control flow, functions, strings and arrays, file I/O, processes, and scripting practices • Zsh differences, globbing, arrays, and configuration • Common command-line tools for text processing, file operations, and system tasks • Terminal editors including Nano, Vim, and Emacs Topics are organized as short reference entries with examples, notes, warnings, and tables where they help clarify syntax and behavior. ShellRef also includes: • Offline access to the full reference library • Search across commands, topics, examples, and notes • My Quick Refs for saving frequently used entries • A CRT-inspired interface with White, Green, and Amber phosphor display modes • Optional scanlines and adjustable display glow • Reduced-effects controls for a cleaner reading experience • Adjustable text size for easier reading on iPhone and iPad ShellRef is intended for developers, sysadmins, students, and anyone who wants a readable shell reference without ads, accounts, or an internet connection.
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Verdict
The clearest difference is price: Python Data Structures & Algo at Free against ShellRef's $0.99. ShellRef's advantage is update cadence (every 3 weeks vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Python Data Structures & Algo is free to download; ShellRef costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Python Data Structures & Algo ships an update every 2 months, ShellRef every 3 weeks. The most recent releases landed on October 1, 2026 and October 2, 2026 respectively.
| Parameter | Python Data Structures & Algo | ShellRef |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 — better | 17.6 |
| Further details — not scored | ||
| Size | 17 MB | 19 MB |
| Age rating | 4+ | 4+ |
| Developer | ALG Software Lab | Andrew Bacon |
In-app purchases
Python Data Structures & Algo
No in-app purchases
ShellRef
No in-app purchases
Questions
Is Python Data Structures & Algo free?
Is ShellRef free?
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