Comparison

Python Data Structures & Algo vs ShellRef

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Python Data Structures & Algo

Features
Read full description

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!

About

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.

Highlights
  • Offline Bash and Zsh reference
  • Terminal editor guides (Nano, Vim, Emacs)
  • Quick command lookup
  • Searchable content
  • Customizable themes
  • Adjustable text size
  • Bookmarks
Features
Read full description

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.

Screenshots

Python Data Structures & Algo4 screens
ShellRef4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 7 level
Python Data Structures & Algo versus ShellRef: the parameters behind the verdict, then further details
ParameterPython Data Structures & AlgoShellRef
PriceFree — better$0.99
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 2 monthsEvery 3 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Paid
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.0 — better17.6
Further details — not scored
Size17 MB19 MB
Age rating4+4+
DeveloperALG Software LabAndrew Bacon

In-app purchases

None

Python Data Structures & Algo

No in-app purchases

None

ShellRef

No in-app purchases

Questions

Is Python Data Structures & Algo free?
Python Data Structures & Algo is free to download, with no in-app purchases.
Is ShellRef free?
ShellRef costs $0.99, with no in-app purchases.
Do Python Data Structures & Algo or ShellRef have ads?
Neither Python Data Structures & Algo nor ShellRef shows ads.
Which is updated more often, Python Data Structures & Algo or ShellRef?
Python Data Structures & Algo ships an update every 2 months, and ShellRef every 3 weeks. Most recently, Python Data Structures & Algo was updated on October 1, 2026 and ShellRef on October 2, 2026.

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