Algo Viewer
Learn Algorithms Visually
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
See 40 algorithms come alive, step by step. New: an Algorithm of the Day widget that changes daily. 17 algorithms are free, with no ads and no subscriptions.
AlgoViewer helps you understand algorithms the way they were meant to be understood — 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
40 algorithms and data structures across 6 categories:
• Search — Linear, Binary, Interpolation, Jump, Exponential
• Sorting — Bubble, Selection, Insertion, Merge, Quick, Heap, Shell, Counting, Radix
• Linear Data Structures — Stack, Queue, Deque, Linked List, Doubly Linked List, Circular Linked List
• Non-Linear Data Structures — Binary Tree, Binary Search Tree, AVL Tree, Heap, Hash Table
• Graphs — BFS, DFS, Dijkstra, Prim, Kruskal, Bellman-Ford, Floyd-Warshall
• Math — Factorial, Fibonacci, GCD, LCM, Sieve of Eratosthenes, Prime Factorization, Fast Exponentiation, Catalan Numbers
• Home Screen and Lock Screen widgets: a new Algorithm of the Day every day, plus your streak and progress.
HOW IT WORKS
1. Pick an algorithm
2. Enter your own data or use random values
3. Tap play and watch each step unfold with color-coded animations
4. Read the explanation to understand the "why" behind each step
5. Check out the code — every algorithm includes examples in Swift, Python, and Java
BUILT FOR LEARNING
• Step-by-step animations you can pause, step through, and speed up
• Detailed explanations with complexity analysis and real-world use cases
• Code examples in 3 languages with copy support
• Time complexity charts so you can see how algorithms scale
• Quizzes for every algorithm to test what you learned
• Your progress, achievements, and favorites sync with iCloud
• Light and dark mode
• Available in English and Spanish
FREE TO START, ONE-TIME UNLOCK
17 algorithms are free, forever. Unlock all 40 with a single one-time purchase: no subscriptions and no ads.
Built with care by a developer who believes the best way to learn an algorithm is to see it in action.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
• If you bought Algo Viewer before it became free, all Pro content now unlocks automatically. Don't see it? Go to Settings › Help & Support › Restore Purchases.
• The Algorithm of the Day widget now changes every day on its own, in your language
• Lock Screen widgets look better and follow your Lock Screen colors
• New Help & Support screen: contact us, privacy, help, and more apps from us to discover.
• Smoother, more reliable experience overall
The developer, Abraham Abreu, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Abraham Abreu
- Size
- 22.6 MB
- Category
- Education
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English and Spanish
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Premium Unlock $0.99
- Copyright
- © 2026