Comparison

Data Structure Display vs Recallio

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

Recallio

Features
Read full description

Overwhelmed by how much you need to memorize? Worried about forgetting key concepts before your big exam? Stop passive reading and start active recall with Recallio, the smart flashcard app designed for serious students, medical professionals, and lifelong learners. Whether you're studying for the USMLE, mastering a new language, or tackling complex engineering diagrams, Recallio uses the latest in cognitive science to ensure you never forget what you've learned. Terms of Use: https://23f1001753.github.io/Recallio/terms.html Privacy Policy: https://23f1001753.github.io/Recallio/privacy.html

Screenshots

Data Structure Display4 screens
Recallio4 screens

Verdict

The call

The clearest difference is device support: Data Structure Display at 4 against Recallio's 2. Data Structure Display also leads on iOS requirement (13.0 vs 26.2). On price, 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. Data Structure Display sells 1 one-off in-app purchase and Recallio sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Scorecard2 real differences · 8 level
Data Structure Display versus Recallio: the parameters behind the verdict, then further details
ParameterData Structure DisplayRecallio
PriceFreeFree
Rating4.5 (676 ratings) — better—
Positive reviews61.9% of reviews—
Number of ratings676 — better—
Update frequencyEvery 5 months—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPad
Requires iOS13.0 — better26.2
Further details — not scored
Size8 MB3 MB
Age rating4+4+
DeveloperJinan Matrix Information Technology Co., Ltd.Makarand Koli

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

Recallio

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
2 purchases

Recallio

Subscriptions2
  • Recallio Pro$3.991 Month
  • Recallio Pro$29.991 Year

Questions

Is Data Structure Display free?
Data Structure Display is free to download, with in-app purchases available.
Is Recallio free?
Recallio is free to download, with in-app purchases available.
Do Data Structure Display or Recallio have ads?
Neither Data Structure Display nor Recallio shows ads.

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