Data Structure Display vs Easy Probability
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
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.
- Gradual learning curve
- Interactive quizzes
- Voice-over narration
- Voice input for answers
- Dark theme support
- Portrait and landscape modes
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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
Verdict
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
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.
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.
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.
| Parameter | Data Structure Display | Easy Probability |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (676 ratings) — better | 4.2 (5 ratings) |
| Positive reviews | 61.9% of reviews — better | 0.0% of reviews |
| Number of ratings | 676 — better | 5 |
| Update frequency | Every 5 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 8.0 — better |
| Further details — not scored | ||
| Size | 8 MB | 39 MB |
| Age rating | 4+ | +4 |
| Developer | Jinan Matrix Information Technology Co., Ltd. | Jelle Van den Eynde |
Customer experience
Data Structure Display
Easy Probability
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
Data Structure Display
- Unlock all data structures$2.99
Easy Probability
- Module 2 quizzes$0.99
Questions
Is Data Structure Display free?
Is Easy Probability free?
Which has better reviews, Data Structure Display or Easy Probability?
Do Data Structure Display or Easy Probability have ads?
Which is updated more often, Data Structure Display or Easy Probability?
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