# Data Structure Display vs Kids Safety

The clearest difference is review sentiment: Kids Safety at 100% against Data Structure Display's 62%. Kids Safety also leads on rating (5.0 vs 4.5) and update cadence (monthly vs every 5 months). Data Structure Display's advantage is ads (none vs shown) and ratings volume (676 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. Data Structure Display sells 1 one-off in-app purchase and Kids Safety sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Kids Safety holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: Data Structure Display has 676 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 62% of Data Structure Display's written reviews are positive against 100% of Kids Safety's.

Data Structure Display ships an update every 5 months, Kids Safety monthly. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Data Structure Display | Kids Safety |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (676 ratings)](https://appshunter.io/ios/app/data-structure-display/id1455489695/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/kids-safety-parent-guide-app/id6802184629/reviews)** |
| Number of ratings | **676** | 1 |
| Positive reviews | 61.9% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 37 MB |
| Requires iOS | **13.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 12+ |
| Developer | [Jinan Matrix Information Technology Co., Ltd.](https://appshunter.io/developer/1009091575) | [MD SHAHANUL HAQUE](https://appshunter.io/developer/1896775815) |

## 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


### Kids Safety

[App page](https://appshunter.io/ios/app/kids-safety-parent-guide-app/id6802184629)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kids Safety: Parent Guide Pro | $3.99 | one-time |


## Frequently asked questions

### Is Data Structure Display free?

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

### Is Kids Safety free?

Kids Safety is free to download, with in-app purchases available.

### Which has better reviews, Data Structure Display or Kids Safety?

Kids Safety is rated higher. Data Structure Display averages 4.5 out of 5 from 676 ratings, while Kids Safety averages 5.0 from 1 ratings.

### Do Data Structure Display or Kids Safety have ads?

Kids Safety shows ads; Data Structure Display does not.

### Which is updated more often, Data Structure Display or Kids Safety?

Data Structure Display ships an update every 5 months, and Kids Safety monthly. Most recently, Data Structure Display was updated on October 21, 2026 and Kids Safety on October 24, 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.*