# Data Structure Display vs LeetCard

The clearest difference is ads: Data Structure Display at none against LeetCard's shown. Data Structure Display also leads on ratings volume (676 vs 75) and review sentiment (62% vs 54%). LeetCard's advantage is update cadence (every 2 days vs every 5 months). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. Data Structure Display sells 1 one-off in-app purchase and LeetCard sells 3 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.5 for Data Structure Display against 4.4 for LeetCard. That said, the two scores are not equally well evidenced: Data Structure Display has 676 ratings behind it against 75, so its average is the more settled of the two. Written reviews are what separate them: 62% of Data Structure Display's written reviews are positive against 54% of LeetCard's.

Data Structure Display ships an update every 5 months, LeetCard every 2 days. The most recent releases landed on September 24, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Data Structure Display | LeetCard |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (676 ratings)](https://appshunter.io/ios/app/data-structure-display/id1455489695/reviews)** | [4.4 (75 ratings)](https://appshunter.io/ios/app/leetcard-coding-flashcards/id6478087443/reviews) |
| Number of ratings | **676** | 75 |
| Positive reviews | **61.9% of reviews** | 53.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 8 MB | 124 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jinan Matrix Information Technology Co., Ltd.](https://appshunter.io/developer/1009091575) | [Kubicle LLC](https://appshunter.io/developer/1679797468) |

## 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


### LeetCard

[App page](https://appshunter.io/ios/app/leetcard-coding-flashcards/id6478087443)

Prepare for coding interviews with AI-powered flashcards and adaptive learning. Master data structures, algorithms, and coding patterns with personalized plans and intelligent hints. Track your progress with detailed analytics to identify weak areas and stay motivated.

**Highlights:** AI-powered hints, Personalized study plans, Smart flashcards, Clean organization, Personalized dashboard, Detailed analytics

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LeetCard Pro | $3.99 | per month |
| LeetCard Pro | $24.99 | per year |
| LeetCard Pro | $39.99 | one-time |


## Frequently asked questions

### Is Data Structure Display free?

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

### Is LeetCard free?

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

### Which has better reviews, Data Structure Display or LeetCard?

Data Structure Display is rated higher. Data Structure Display averages 4.5 out of 5 from 676 ratings, while LeetCard averages 4.4 from 75 ratings.

### Do Data Structure Display or LeetCard have ads?

LeetCard shows ads; Data Structure Display does not.

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

Data Structure Display ships an update every 5 months, and LeetCard every 2 days. Most recently, Data Structure Display was updated on September 24, 2026 and LeetCard on September 21, 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.*