# Data Structure Display vs Algo Demo

The clearest difference is in-app purchases: Algo Demo at none against Data Structure Display's 1. Data Structure Display's advantage is ads (none vs shown) and device support (4 vs 2). On price, update cadence and iOS requirement there is nothing between them.

Both are free to download. Data Structure Display sells 1 one-off in-app purchase. Algo Demo asks for nothing beyond the download.

Data Structure Display ships an update every 5 months, Algo Demo every 4 months. The most recent releases landed on October 13, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Data Structure Display | Algo Demo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (676 ratings)](https://appshunter.io/ios/app/data-structure-display/id1455489695/reviews)** | — |
| Number of ratings | **676** | — |
| Positive reviews | 61.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 36 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Jinan Matrix Information Technology Co., Ltd.](https://appshunter.io/developer/1009091575) | [zhuo zeng](https://appshunter.io/developer/1435764582) |

## What reviewers say

### Data Structure Display

[App page](https://appshunter.io/ios/app/data-structure-display/id1455489695)

Explore and learn data structures through dynamic debugging and visual observation of changes. This app covers linear structures, trees, graphs, and recursive algorithms like the Tower of Hanoi, offering interactive learning experiences.

**Highlights:** Dynamic data structure debugging, Visual observation of data structure changes, Learn linear structures (arrays, lists, queues, stacks), Explore tree structures (binary, AVL, red-black, heap), Understand graph structures and algorithms, Debug recursive algorithms like Tower of Hanoi

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all data structures | $2.99 | one-time |

**What reviewers like**

- 📚 Excellent for DSA learning and studying
- ✨ Interactive components and pseudo code quality
- 👍 Good reference material for beginners
- 🎓 Unique educational content

**What reviewers complain about**

- 🔒 90% of content locked behind $2.99 paywall
- 📖 Incomplete coverage of data structures
- ✍️ Poor grammar and spelling
- 📱 No dark mode support on macOS
- 🔔 Excessive review prompts

**Reported bugs**

- Aggressive review request frequency
- Inconsistent dark mode functionality between iOS and macOS

**Requested features**

- Dark mode implementation
- Comprehensive coverage of all data structure variants
- More practical exercises and problems
- Ad-supported free tier instead of paywall


### Algo Demo

[App page](https://appshunter.io/ios/app/algo-demo/id6746090108)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Data Structure Display free?

Data Structure Display is free to download, with in-app purchases available.

### Is Algo Demo free?

Algo Demo is free to download, with no in-app purchases.

### Do Data Structure Display or Algo Demo have ads?

Algo Demo shows ads; Data Structure Display does not.

### Which is updated more often, Data Structure Display or Algo Demo?

Data Structure Display ships an update every 5 months, and Algo Demo every 4 months. Most recently, Data Structure Display was updated on October 13, 2026 and Algo Demo 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.*