Comparison

Delta 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

Delta

This app helps users solve math problems by creating and executing algorithms. It offers tools for homework checking, test preparation, and creating custom quizzes. Users can save, share, and download algorithms via the cloud.

Highlights
  • Create algorithms with natural language
  • Execute algorithms to solve math problems
  • Create and download custom quizzes
  • Save and share algorithms
  • Cloud synchronization for algorithms
Features
Read full description

With Delta: Algorithms, quickly solve any math problem with an algorithm. Save time checking your homework or studying for a test, it’s free! AVAILABLE FEATURES - Create algorithms with an easy and natural language in the editor - Quickly execute algorithms to solve any math problem - Create (or download) a quiz to train yourself - Save your algorithms on your device, share then on the Cloud, or download ready-to-use algorithms shared by other people EXAMPLE OF USAGE - Create an automated calculator for well known theorems or equations - Create a quiz to train solving equations CLOUD SUBSCRIPTION A Cloud subscription is available; It allows you to synchronize your algorithms across your devices and share them with other people on the Cloud. Application developed by Nathan Fallet © 2020 Groupe MINASTE

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

Delta4 screens
Data Structure Display4 screens

Verdict

The call

The clearest difference is rating: Data Structure Display at 4.5 against Delta's 3.1. Data Structure Display also leads on ratings volume (676 vs 7). Delta's advantage is update cadence (monthly vs every 5 months). On price, review sentiment, ads and in-app purchases 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. Delta sells 3 one-off in-app purchases and Data Structure Display 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 3.1. That said, the two scores are not equally well evidenced: Data Structure Display has 676 ratings behind it against 7, so its average is the more settled of the two. Written reviews complicate that: 67% of Delta'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

Delta ships an update monthly, Data Structure Display every 5 months. The most recent releases landed on October 14, 2026 and October 17, 2026 respectively.

Scorecard3 real differences · 7 level
Delta versus Data Structure Display: the parameters behind the verdict, then further details
ParameterDeltaData Structure Display
PriceFreeFree
Rating3.1 (7 ratings)4.5 (676 ratings) — better
Positive reviews66.7% of reviews — better61.9% of reviews
Number of ratings7676 — better
Update frequencyMonthly — betterEvery 5 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPad, iPod, MaciPhone, iPad, iPod, Mac
Requires iOS13.013.0
Further details — not scored
Size5 MB8 MB
Age rating4+4+
DeveloperGroupe MINASTEJinan Matrix Information Technology Co., Ltd.

Customer experience

Delta

All ratings7 ratings
Positive57.1%
Neutral0.0%
Negative42.9%
Written reviews9 reviews
Positive66.7%
Neutral11.1%
Negative22.2%

Data Structure Display

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

Bugs and requests

Delta

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

3 purchases

Delta

One-time3
  • Donation 1$0.99
  • Donation 2$2.99
  • Donation 3$4.99
1 purchases

Data Structure Display

One-time1
  • Unlock all data structures$2.99

Questions

Is Delta free?
Delta is free to download, with in-app purchases available.
Is Data Structure Display free?
Data Structure Display is free to download, with in-app purchases available.
Which has better reviews, Delta or Data Structure Display?
Data Structure Display is rated higher. Delta averages 3.1 out of 5 from 7 ratings, while Data Structure Display averages 4.5 from 676 ratings.
Do Delta or Data Structure Display have ads?
Neither Delta nor Data Structure Display shows ads.
Which is updated more often, Delta or Data Structure Display?
Delta ships an update monthly, and Data Structure Display every 5 months. Most recently, Delta was updated on October 14, 2026 and Data Structure Display on October 17, 2026.

Other comparisons