Comparison

Data Structure Display vs LeetCard

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Data Structure Display

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
Read full description

A novel data structure learning app, the most significant feature is that you can dynamically debug the data structure in this app, and visually observe the changes in the data structure during the operation. In this app you can learn the following data structures: 1. Linear structures, including arrays, linked lists, queues, stacks. Linear structures are the basis for other advanced data structures, as fine as advanced algorithms. 2. Tree structures, including binary tree, binary search tree, AVL tree, red-black tree, and heap. In this app, you can dynamically debug three traversals of the binary tree (including non-recursive traversal implementations), searching in the tree, balance adjustments in the AVL tree and red-black tree, and heap sorting. Give you the ability of handwritten red-black trees. 3. Graph structure, including the adjacency list storage representation of the graph structure, depth-first search and breadth-first search, finding the Euler path in the graph, topological sorting, maximum connected components, minimum spanning tree problem, and shortest single source Path problem. It also provides dynamic debugging of these classic graph algorithms. 4. The data structure introductory class will talk about the problem of the Tower of Hanoi. The algorithm that solves this problem is often recursive. This app provides dynamic debugging of the Tower of Hanoi problem, so you can no longer be confused about the recursive calls of the Tower of Hanoi.

About

LeetCard

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
Read full description

LeetCard is an AI-powered coding interview prep app that helps you master problems through smart flashcards, adaptive learning, and focused practice. Whether you're brushing up on fundamentals or grinding LeetCode Hard, LeetCard keeps you on track with personalized plans, clean organization, and intelligent hints - so you never get stuck. Key Features: • AI-powered hints for every problem, powered by OpenAI • Personalized study plans that adapt to your level • Smart flashcards for fast, on-the-go review • Clean organization of problems, notes, and progress • A personalized dashboard to stay focused and motivated • Detailed analytics to monitor growth and spot weak areas Support: • Privacy Policy: https://www.kubicle.studio/leetcard/privacy.html • Terms and Conditions: https://www.kubicle.studio/leetcard/terms.html

Screenshots

Data Structure Display4 screens
LeetCard4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard6 real differences · 4 level
Data Structure Display versus LeetCard: the parameters behind the verdict, then further details
ParameterData Structure DisplayLeetCard
PriceFreeFree
Rating4.5 (676 ratings) — better4.4 (75 ratings)
Positive reviews61.9% of reviews — better53.8% of reviews
Number of ratings676 — better75
Update frequencyEvery 5 monthsEvery 2 days — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone
Requires iOS13.0 — better16.4
Further details — not scored
Size8 MB124 MB
Age rating4+4+
DeveloperJinan Matrix Information Technology Co., Ltd.Kubicle LLC

Customer experience

Data Structure Display

All ratings676 ratings
Positive87.1%
Neutral2.4%
Negative10.5%
Written reviews42 reviews
Positive61.9%
Neutral2.4%
Negative35.7%

LeetCard

All ratings75 ratings
Positive85.3%
Neutral1.3%
Negative13.3%
Written reviews13 reviews
Positive53.8%
Neutral7.7%
Negative38.5%

Bugs and requests

Data Structure Display

Reported bugs

2 issues
  • Aggressive review request frequency
  • Inconsistent dark mode functionality between iOS and macOS

Requested features

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

LeetCard

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Data Structure Display

One-time1
  • Unlock all data structures$2.99
3 purchases

LeetCard

Subscriptions2
  • LeetCard Pro$3.991 Month
  • LeetCard Pro3 Days trial$24.991 Year
One-time1
  • LeetCard Pro$39.99

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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