Comparison

Data Structure Display vs CDMP Data Management Prep

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

CDMP Data Management Prep

Features
Read full description

Get ready for the CDMP (Certified Data Management Professional) exam with 150 original practice questions across 10 topic areas you can study anytime, anywhere - completely offline. Disclaimer: This is an unofficial, independent study app. It is not affiliated with, endorsed by, or sponsored by DAMA International. CDMP® and DMBOK® are registered trademarks of DAMA International. All questions are original and based on publicly available information about the exam objectives. What you get - 150 multiple-choice questions, each with a clear explanation - 10 topic areas mirroring the real exam domains: DM Framework, Governance, Architecture & Modeling, Storage & Integration, Security, MDM, DW/BI, Metadata, Data Quality - Study by topic, a shuffled Random mode, or a timed Mock Exam - Instant feedback with the correct answer and why it is right - Automatic review list of missed questions plus bookmarks - 100% offline - no account, no login, no ads, and no data collection - One-time purchase; every feature is unlocked from the start How to use 1. Open the app - no account or login is required. 2. Choose a topic, Random, or Mock Exam from the Home screen. 3. Answer each question and tap Submit to see the correct answer and explanation. 4. Revisit missed questions and bookmarks anytime; progress is saved locally on your device. This is a one-time paid app. All 150 questions are bundled inside the app as static content, and nothing is ever collected or uploaded.

Screenshots

Data Structure Display4 screens
CDMP Data Management Prep4 screens

Verdict

The call

The clearest difference is price: Data Structure Display at Free against CDMP Data Management Prep's $4.99. Data Structure Display also leads on iOS requirement (13.0 vs 15.1). CDMP Data Management Prep's advantage is in-app purchases (none vs 1) and update cadence (every 2 weeks vs every 5 months). On ads and device support 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

Data Structure Display is free to download; CDMP Data Management Prep costs $4.99 up front. Data Structure Display sells 1 one-off in-app purchase. CDMP Data Management Prep asks for nothing beyond the download.

UpkeepUpdate frequency

Data Structure Display ships an update every 5 months, CDMP Data Management Prep every 2 weeks. The most recent releases landed on October 21, 2026 and October 16, 2026 respectively.

Scorecard4 real differences · 6 level
Data Structure Display versus CDMP Data Management Prep: the parameters behind the verdict, then further details
ParameterData Structure DisplayCDMP Data Management Prep
PriceFree — better$4.99
Rating4.5 (676 ratings) — better—
Positive reviews61.9% of reviews—
Number of ratings676 — better—
Update frequencyEvery 5 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size8 MB33 MB
Age rating4+4+
DeveloperJinan Matrix Information Technology Co., Ltd.satoshi yoshida

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

CDMP Data Management Prep

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
None

CDMP Data Management Prep

No in-app purchases

Questions

Is Data Structure Display free?
Data Structure Display is free to download, with in-app purchases available.
Is CDMP Data Management Prep free?
CDMP Data Management Prep costs $4.99, with no in-app purchases.
Do Data Structure Display or CDMP Data Management Prep have ads?
Neither Data Structure Display nor CDMP Data Management Prep shows ads.
Which is updated more often, Data Structure Display or CDMP Data Management Prep?
Data Structure Display ships an update every 5 months, and CDMP Data Management Prep every 2 weeks. Most recently, Data Structure Display was updated on October 21, 2026 and CDMP Data Management Prep on October 16, 2026.

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