# Java Quiz 500+ Questions Free vs Data Structure Display

The clearest difference is review sentiment: Data Structure Display at 62% against Java Quiz 500+ Questions Free's 0%. Data Structure Display also leads on rating (4.5 vs 2.0) and ratings volume (676 vs 3). Java Quiz 500+ Questions Free's advantage is in-app purchases (none vs 1) and iOS requirement (8.0 vs 13.0). On price, ads and device support there is nothing between them.

Both are free to download. Data Structure Display sells 1 one-off in-app purchase. Java Quiz 500+ Questions Free asks for nothing beyond the download.

Data Structure Display holds the better App Store score, 4.5 against 2.0. That said, the two scores are not equally well evidenced: Data Structure Display has 676 ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 0% of Java Quiz 500+ Questions Free's written reviews are positive against 62% of Data Structure Display's.

## The numbers

| Metric | Java Quiz 500+ Questions Free | Data Structure Display |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (3 ratings)](https://appshunter.io/ios/app/java-quiz-500-plus-questions-free/id1128710278/reviews) | **[4.5 (676 ratings)](https://appshunter.io/ios/app/data-structure-display/id1455489695/reviews)** |
| Number of ratings | 3 | **676** |
| Positive reviews | 0.0% of reviews | **61.9% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 5 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 6 MB | 8 MB |
| Requires iOS | **8.0** | 13.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [HARIKRISHNA VALLAKATLA](https://appshunter.io/developer/1024902607) | [Jinan Matrix Information Technology Co., Ltd.](https://appshunter.io/developer/1009091575) |

## What reviewers say

### Java Quiz 500+ Questions Free

[App page](https://appshunter.io/ios/app/java-quiz-500-plus-questions-free/id1128710278)

Prepare for Java exams and interviews with a comprehensive quiz app. It offers a large question bank, rationale for each answer, and offline functionality. Bookmark favorite questions and track your strong and weak areas.

**Highlights:** 500+ comprehensive Java questions, Rationale provided for each question, Bookmark favorite questions, Tracks strong and weak questions, Offline functionality, Share questions with friends

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Java Quiz 500+ Questions Free free?

Java Quiz 500+ Questions Free is free to download, with no in-app purchases.

### Is Data Structure Display free?

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

### Which has better reviews, Java Quiz 500+ Questions Free or Data Structure Display?

Data Structure Display is rated higher. Java Quiz 500+ Questions Free averages 2.0 out of 5 from 3 ratings, while Data Structure Display averages 4.5 from 676 ratings.

### Do Java Quiz 500+ Questions Free or Data Structure Display have ads?

Neither Java Quiz 500+ Questions Free nor Data Structure Display shows ads.

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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.*