# Data Structure Display vs CDMP Data Management Prep

The clearest difference is price: Data Structure Display at Free against CDMP Data Management Prep's $4.99. Data Structure Display also leads on iOS requirement (13.0 vs 15.1). CDMP Data Management Prep's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 5 months). On ads and device support there is nothing between them.

Data Structure Display is free to download; CDMP Data Management Prep costs $4.99 up front. Data Structure Display sells 1 one-off in-app purchase. CDMP Data Management Prep asks for nothing beyond the download.

Data Structure Display ships an update every 5 months, CDMP Data Management Prep every 2 weeks. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Data Structure Display | CDMP Data Management Prep |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| 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 | No |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 33 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Jinan Matrix Information Technology Co., Ltd.](https://appshunter.io/developer/1009091575) | [satoshi yoshida](https://appshunter.io/developer/1873856165) |

## 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


### CDMP Data Management Prep

[App page](https://appshunter.io/ios/app/cdmp-data-management-prep/id6790817163)

**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 CDMP Data Management Prep free?

CDMP Data Management Prep costs $4.99, with no in-app purchases.

### Do Data Structure Display or CDMP Data Management Prep have ads?

Neither Data Structure Display nor CDMP Data Management Prep shows ads.

### Which is updated more often, Data Structure Display or CDMP Data Management Prep?

Data Structure Display ships an update every 5 months, and CDMP Data Management Prep every 2 weeks. Most recently, Data Structure Display was updated on October 21, 2026 and CDMP Data Management Prep on October 16, 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.*