Comparison

Data Structure Display vs Easy Probability

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

Easy Probability

Master basic probability with interactive quizzes designed to improve your academic performance and decision-making skills. The app offers a gradual learning curve, starting with simple problems and progressing to more complex challenges, all without advertisements.

Highlights
  • Gradual learning curve
  • Interactive quizzes
  • Voice-over narration
  • Voice input for answers
  • Dark theme support
  • Portrait and landscape modes
Read full description

Learning basic probability is quick & easy, and will pay off for the rest of your life. You'll get better grades in school, do better at job interviews, and make better decisions. We'll start with the easiest quizzes imaginable, and work our way to challenging problems one tiny step at a time. Your friends & family will be impressed you can do this! * No advertisements * No sign-up screens * Supports dark theme * Supports portrait & landscape mode * Optional narrator voice-over * Option to answer with your voice * Calculations are verified with simulations When using audio mode with earphones or speakers, the app reacts to taps anywhere on the screen, so you can practice without looking at the screen.

Screenshots

Data Structure Display4 screens
Easy Probability4 screens

Verdict

The call

The clearest difference is review sentiment: Data Structure Display at 62% against Easy Probability's 0%. Data Structure Display also leads on ratings volume (676 vs 5) and rating (4.5 vs 4.2). Easy Probability's advantage is update cadence (every 2 weeks vs every 5 months) and iOS requirement (8.0 vs 13.0). On price, ads, 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 Easy Probability sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Data Structure Display holds the better App Store score, 4.5 against 4.2. That said, the two scores are not equally well evidenced: Data Structure Display has 676 ratings behind it against 5, 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 0% of Easy Probability's.

UpkeepUpdate frequency

Data Structure Display ships an update every 5 months, Easy Probability every 2 weeks. The most recent releases landed on October 3, 2026 and October 7, 2026 respectively.

Scorecard5 real differences · 5 level
Data Structure Display versus Easy Probability: the parameters behind the verdict, then further details
ParameterData Structure DisplayEasy Probability
PriceFreeFree
Rating4.5 (676 ratings) — better4.2 (5 ratings)
Positive reviews61.9% of reviews — better0.0% of reviews
Number of ratings676 — better5
Update frequencyEvery 5 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS13.08.0 — better
Further details — not scored
Size8 MB39 MB
Age rating4++4
DeveloperJinan Matrix Information Technology Co., Ltd.Jelle Van den Eynde

Customer experience

Data Structure Display

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

Easy Probability

All ratings5 ratings
Positive80.0%
Neutral0.0%
Negative20.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

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

Easy Probability

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
1 purchases

Easy Probability

One-time1
  • Module 2 quizzes$0.99

Questions

Is Data Structure Display free?
Data Structure Display is free to download, with in-app purchases available.
Is Easy Probability free?
Easy Probability is free to download, with in-app purchases available.
Which has better reviews, Data Structure Display or Easy Probability?
Data Structure Display is rated higher. Data Structure Display averages 4.5 out of 5 from 676 ratings, while Easy Probability averages 4.2 from 5 ratings.
Do Data Structure Display or Easy Probability have ads?
Neither Data Structure Display nor Easy Probability shows ads.
Which is updated more often, Data Structure Display or Easy Probability?
Data Structure Display ships an update every 5 months, and Easy Probability every 2 weeks. Most recently, Data Structure Display was updated on October 3, 2026 and Easy Probability on October 7, 2026.

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