Comparison

Algo Viewer vs Algorithm Fundamentals

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

Algo Viewer

Features
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AlgoViewer helps you understand algorithms the way they were meant to be understood โ€” by watching them work, step by step. Whether you're a CS student studying for exams, a developer preparing for technical interviews, or just someone curious about how sorting, searching, and graph traversal actually work, this app breaks it down visually so it clicks. WHAT'S INSIDE 34 algorithms across 6 categories: โ€ข Search โ€” Linear Search, Binary Search, Interpolation Search โ€ข Sorting โ€” Bubble, Selection, Insertion, Merge, Heap, Quick, Radix โ€ข Linear Data Structures โ€” Stack, Queue, Linked List, Doubly Linked List, Circular Linked List โ€ข Non-Linear Data Structures โ€” Binary Tree, BST, Heap, Hash Table โ€ข Graphs โ€” BFS, DFS, Dijkstra, Prim, Kruskal, Bellman-Ford, Floyd-Warshall โ€ข Math โ€” Factorial, Fibonacci, GCD, Sieve of Eratosthenes, Prime Factorization, Fast Exponentiation, LCM, Catalan Numbers HOW IT WORKS 1. Pick an algorithm 2. Set your own input data or use a preset 3. Tap play and watch each step unfold with clear, color-coded animations 4. Read the detailed explanation to understand the "why" behind each step 5. Check out the code โ€” every algorithm includes examples in Swift, Python, and Java BUILT FOR LEARNING โ€ข Step-by-step animations you can pause, rewind, and speed up โ€ข Detailed explanations with complexity analysis and real-world use cases โ€ข Code examples in 3 languages with copy support โ€ข Time complexity charts so you can see how algorithms scale โ€ข Light and dark mode โ€ข Fully bilingual โ€” complete English and Spanish support NO ADS. NO SUBSCRIPTIONS. One purchase. That's it. You get everything, including future updates with new algorithms and categories at no extra cost. Built with care by a developer who believes the best way to learn an algorithm is to see it in action.

About

Algorithm Fundamentals

Features
Read full description

Algorithm Fundamentals is an independent study app for building confidence with core computer science problem-solving skills. It is designed for students, self-taught developers, bootcamp learners, and interview candidates who want focused practice without distractions. Study across Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts, including big-O notation, sorting algorithms, search algorithms, recursion basics, command-line basics, version-control concepts, debugging techniques, and software testing basics. Features: - 160 practice questions - FSRS spaced-repetition intervals - Weak-point heatmap to spot topics that need review - Daily challenge for consistent practice - Mock exams for timed review - Explanation included with every question - Offline practice, no login required Independent study app for Algorithm Fundamentals practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners. Privacy: Practice offline, no login required.

Screenshots

Algo Viewer3 screens
Algorithm Fundamentals4 screens

Verdict

The call

The clearest difference is in-app purchases: Algorithm Fundamentals at none against Algo Viewer's 1. Algorithm Fundamentals also leads on iOS requirement (15.1 vs 26.0). On price, ads and device support there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Algo Viewer sells 1 one-off in-app purchase. Algorithm Fundamentals asks for nothing beyond the download.

Scorecard2 real differences ยท 4 level
Algo Viewer versus Algorithm Fundamentals: the parameters behind the verdict, then further details
ParameterAlgo ViewerAlgorithm Fundamentals
PriceFreeFree
Update frequencyEvery 3 monthsโ€”
AdsNoNo
In-app purchasesYesNo โ€” better
DevicesiPhone, iPadiPhone, iPad, iPod โ€” better
Requires iOS26.015.1 โ€” better
Further details โ€” not scored
Size18 MB38 MB
Age rating4+4+
DeveloperAbraham AbreuAFTW LLC

In-app purchases

1 purchases

Algo Viewer

One-time1
  • Premium Unlock$0.99
None

Algorithm Fundamentals

No in-app purchases

Questions

Is Algo Viewer free?
Algo Viewer is free to download, with in-app purchases available.
Is Algorithm Fundamentals free?
Algorithm Fundamentals is free to download, with no in-app purchases.
Do Algo Viewer or Algorithm Fundamentals have ads?
Neither Algo Viewer nor Algorithm Fundamentals shows ads.

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