Comparison

Algorithms HQ vs Data Structure Display

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

Head to head
About

Algorithms HQ

Learn computer science algorithms through interactive animations. Visualize data manipulation and execution step-by-step with pseudo-code tracking and variable value updates. Quickly reference algorithm characteristics and customize input data for deeper understanding.

Highlights
  • Animated algorithm execution
  • Step-by-step instruction control
  • Pseudo-code and variable tracking
  • Customizable input data
  • Algorithm reference guide
  • Data structure evolution visualization
Features
Read full description

A fun and didactic app to learn computer science algorithms! See how algorithms are working by watching an animation of their execution. Understand how data is manipulated as it is animated through an intuitive representation of its contents. Always know which line is executed in the pseudo-code, what are the values of the variables. Need to quickly refresh your memory? Just use the app as a quick reference on the main characteristics of each algorithm! Main features: - Execute a single instruction, or undo the previous one - Run, or rewind the algorithm until you decide to pause the execution - Adjust the speed of the animation - Best and worst case input data for sorting algorithms - Change the input data: size (up to 500), maximum value or data distribution (random, sorted, many duplicates, etc.) - For data structures, choose the next function to execute, or let a scenario choose for you, so you can see how the data structure evolves. - Landscape or portrait orientation This version contains the following algorithms: Linear Data Structures: - Linked Lists, including a view on memory - Queue - Stack Sorting algorithms: - Bubble Sort - Cocktail Sort - Gnome Sort - Insertion Sort - Quick Sort - Selection Sort More algorithms and more features are on the way!

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.

Screenshots

Data Structure Display4 screens

Verdict

The call

The clearest difference is review sentiment: Algorithms HQ at 100% against Data Structure Display's 62%. Algorithms HQ also leads on in-app purchases (none vs 1). Data Structure Display's advantage is rating (4.5 vs 4.0) and ratings volume (676 vs 1). On price and ads 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. Algorithms HQ asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Data Structure Display holds the better App Store score, 4.5 against 4.0. 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 complicate that: 100% of Algorithms HQ's written reviews are positive against 62% of Data Structure Display's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Algorithms HQ ships an update every 16 months, Data Structure Display every 5 months. The most recent releases landed on September 24, 2026 and October 3, 2026 respectively.

Scorecard8 real differences · 2 level
Algorithms HQ versus Data Structure Display: the parameters behind the verdict, then further details
ParameterAlgorithms HQData Structure Display
PriceFreeFree
Rating4.0 (1 ratings)4.5 (676 ratings) — better
Positive reviews100.0% of reviews — better61.9% of reviews
Number of ratings1676 — better
Update frequencyEvery 16 monthsEvery 5 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPadiPhone, iPad, iPod, Mac — better
Requires iOS15.613.0 — better
Further details — not scored
Size3 MB8 MB
Age rating4+4+
DeveloperCyril CarrezJinan Matrix Information Technology Co., Ltd.

Customer experience

Algorithms HQ

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Data Structure Display

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

Bugs and requests

Algorithms HQ

Not enough reviews yet to summarise bugs or 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

In-app purchases

None

Algorithms HQ

No in-app purchases

1 purchases

Data Structure Display

One-time1
  • Unlock all data structures$2.99

Questions

Is Algorithms HQ free?
Algorithms HQ 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, Algorithms HQ or Data Structure Display?
Data Structure Display is rated higher. Algorithms HQ averages 4.0 out of 5 from 1 ratings, while Data Structure Display averages 4.5 from 676 ratings.
Do Algorithms HQ or Data Structure Display have ads?
Neither Algorithms HQ nor Data Structure Display shows ads.
Which is updated more often, Algorithms HQ or Data Structure Display?
Algorithms HQ ships an update every 16 months, and Data Structure Display every 5 months. Most recently, Algorithms HQ was updated on September 24, 2026 and Data Structure Display on October 3, 2026.

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