The Assembler vs Algo Viewer
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
The Assembler
Learn Assembly programming and binary operations by creating pixel art. Each chapter introduces new operations, using 8-bit registers as your canvas to manipulate values and paint an 8x8 image. This app offers a fun, introductory approach to coding fundamentals.
- Learn Assembly programming
- Understand binary operations
- Create pixel art on registers
- Ten chapters with progressive learning
- Interactive 8x8 canvas
- Introduction to programming fundamentals
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Learn Assembly programming and binary operations by painting little pixel art pieces. The app teaches different operations in each of the ten chapters. For each of the chapters you program an image with a limited set of commands. Eight rows of 8-Bit Registers turn into your canvas. Use Assembly to manipulate the values in every register, thus creating an 8x8 painting. 'The Assembler' was made as a small and fun introduction to Assembly, Programming and the Binary system that powers it all. The first version of this app was made for the Swift Student Challenge 2022 and won! I hope that you enjoy this project as much as I have.
Algo Viewer
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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.
Screenshots
Verdict
The clearest difference is in-app purchases: The Assembler at none against Algo Viewer's 1. The Assembler also leads on iOS requirement (17.0 vs 26.0). Algo Viewer's advantage is update cadence (every 6 weeks vs every 5 months). On price, 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
Both are free to download. Algo Viewer sells 1 one-off in-app purchase. The Assembler asks for nothing beyond the download.
The Assembler ships an update every 5 months, Algo Viewer every 6 weeks. The most recent releases landed on September 27, 2026 and October 7, 2026 respectively.
| Parameter | The Assembler | Algo Viewer |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (10 ratings) — better | — |
| Positive reviews | 77.8% of reviews | — |
| Number of ratings | 10 — better | — |
| Update frequency | Every 5 months | Every 6 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, Vision Pro — better | iPhone, iPad |
| Requires iOS | 17.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 7 MB | 22 MB |
| Age rating | 4+ | 4+ |
| Developer | Lena Mattea Stoexen | Abraham Abreu |
In-app purchases
The Assembler
No in-app purchases
Algo Viewer
- Premium Unlock$0.99









