# Algo Demo — Learn Algorithms Visually

> Learn Algorithms Visually (iPhone/iPad app by zhuo zeng.)

- Source: https://appshunter.io/ios/app/algo-demo/id6746090108 (this page in markdown: same URL + `.md`)
- Developer: [zhuo zeng](https://appshunter.io/developer/1435764582)
- Category: Education, Utilities
- Price: Free
- Age rating: 17+
- Requires: iOS 13.0 · 36 MB
- Languages: American English, Chinese (Simplified, China)
- Released: 2025-06-11
- Data updated: 2026-07-19
- User reviews in markdown: https://appshunter.io/ios/app/algo-demo/id6746090108/reviews.md

## What is Algo Demo?

Algo Demo — Visualize Algorithms & Data Structures
Designed for CS students, interview preppers, and educators, Algo Demo demystifies algorithms through interactive animations and step-by-step visualizations.

Covered Topics:
• Data Structures: Linked Lists, Binary Trees, Stacks, Hash Tables
• Core Algorithms: Sorting, Two Pointers, Dynamic Programming, Binary Search

Key Features:
• All-New Progress Control: Our most powerful interactive upgrade yet! Drag a sleek progress bar to jump to any step of an algorithm in real-time. Perfect your understanding by replaying complex parts at your own pace.
• Live Code Playback: Watch the code execute in perfect sync with the visualization. Key lines are highlighted as the algorithm runs, forging a clear connection between abstract logic and concrete implementation.
• Smooth Animations: Break down each step of algorithm execution with crystal-clear visuals.
• Interactive Playback: Adjust speed, pause, or rewind for deeper learning.


## Version history (last 5 releases)

### 1.2.1 — 2026-07-16

Optimized the animation demonstrations for Reverse Linked List, Reverse Linked List II, and Insertion Sort. Fixed some minor UX issues.

### 1.2.0 — 2026-04-03

What's New in Version 1.2.0: Expand Your Algorithmic Toolkit!

This release brings powerful new algorithms, enhanced visual tools, and smarter controls to accelerate your mastery.

New Algorithms Added
- Stack: Largest Rectangle in Histogram, Trapping Rain Water（Stack)
- Hash: Longest Consecutive Sequence
- Binary Method: Copy Books
- Dynamic Programming: Max Daily Sales Sum, Backpack 3 (Infinity), Longest Increasing Subsequence, Trapping Rain Water (DP)

Problems and code can now be previewed in full screen,
Added global speed control for all algorithms,
Optimized the algorithm progress control bar,
Standardized number and index formatting.

### 1.1.0 — 2025-11-20

What's New in Version 1.1.0: Master Algorithms at Your Own Pace!

This major update introduces groundbreaking features that give you unprecedented control over your learning:

Interactive Progress Bar: Take full command of algorithm animations. Seamlessly scrub through any algorithm to review, skip ahead, or meticulously analyze each step. No more missing a critical detail!

Real-Time Code Execution: For the first time, see the exact lines of code being executed during each step. This direct link between visual logic and its programming syntax deepens your understanding and helps you code with confidence.

### 1.0.3 — 2025-08-05

New Features
•	Added multiple algorithm demonstrations:
•	Stack: Wildcard parenthesis matching
•	Two Pointers: 3Sum, Longest unique substring, Minimum window substring
•	Hash: String permutation, First missing positive
•	Binary Tree: Construction from preorder and inorder
•	Binary Search: Peak finding, Closest K values, Wood cutting
•	DP: Maze with obstacles, Stay-at-origin paths, Coin change, Knapsack problems
•	Enhanced binary tree traversal with stack operations
•	Improved sorting animations with smooth arc transitions
Improvements & Fixes
•	Fixed display issues in cycle detection, substring coverage and parenthesis matching
•	Enhanced algorithm explanations with indexes and position markers
•	Redesigned maze examples for better clarity
•	Fixed interaction issues in quick sort and selection sort

### 1.0.2 — 2025-06-11

No release notes.

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## More apps by zhuo zeng

- [数据结构与算法教程](https://appshunter.io/ios/app/id1435764583)
- [Algo Demo Pro](https://appshunter.io/ios/app/algo-demo-pro/id6755234930)

All apps by zhuo zeng: https://appshunter.io/developer/1435764582

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-19.*