Invention Manual vs DSA Master
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Invention Manual
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Invention is how you build cross-platform, native apps with a single C# codebase. This is an interactive manual for learning how to develop in Invention. Benefits of Invention: - Code-first API with no XML files - Layout is arrangeable and composable - Compiles to a native app - Rapid development in Visual Studio - Live editing with Roslyn Write your app code in .NET Standard class libraries using the Invention API. The iOS platform is built on Xamarin technology. Write your app once and deliver to the major app stores. Microsoft Visual Studio Community Edition with Xamarin and the open-source Invention Library makes mobile app/game development in C# both free and easy. twitter https://twitter.com/callan_hodgskin email mailto:hodgskin.callan@gmail.com gitlab https://gitlab.com/hodgskin-callan/Invention
DSA Master
Master algorithms and data structures with interactive visualizations, executable code, and practice challenges. Supports multiple programming languages and offers progress tracking for technical interview preparation.
- Interactive visualizations
- Live code execution
- Multi-language support
- Practice challenges
- Progress tracking
- Algorithm animations
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Master algorithms and data structures with a comprehensive learning platform for computer science students, software engineers, and technical interview preparation. COMPREHENSIVE LEARNING PLATFORM Explore 50+ data structures and algorithms with interactive visualizations, executable code examples, and hands-on practice challenges. From fundamental arrays and linked lists to advanced graph algorithms. INTERACTIVE CODE EXECUTION • Live Code Playground - Write, edit, and execute code in the app • Multi-Language Support - Run code in Python, JavaScript, Java, C++, Kotlin, Dart, and Go • Real-Time Execution Results - See output, errors, and execution time • Syntax Highlighting - Professional code editor with language-specific highlighting • Code Copy & Share - Easily copy code examples or share ANIMATED ALGORITHM VISUALIZATIONS • Step-by-Step Animations - Watch algorithms execute with detailed animated visualizations • Interactive Controls - Play, pause, replay, and control animation speed • Full-Screen Mode - Immersive visualization experience • Visual Data Flow - See how data structures transform during algorithm execution • Multiple Visualization Types - Sorting, searching, tree traversal, graph algorithms COMPREHENSIVE CODE EXAMPLES • 8 Programming Languages - Learn from implementations in Python, JavaScript, Java, C++, Kotlin, Dart, Go, and more • Production-Ready Code - Well-structured, commented code examples • Language Comparison - Compare implementations across different languages • Copy to Playground - Instantly load examples into the code playground • Complexity Analysis - Detailed time and space complexity analysis MODERN INTERFACE & NAVIGATION • Topic Detail Pages - Comprehensive views with Overview, Code, and Visualize sections • Advanced Search & Filtering - Find topics by category, difficulty, or learning path • Smart Recommendations - Personalized topic suggestions • Bookmarks & Notes - Save favorite topics and add personal notes PROGRESS TRACKING & ANALYTICS • Learning Analytics - Track topics completed, challenges solved, and study time • Achievement System - Unlock achievements as you progress • Study Streaks - Build consistent learning habits with daily streak tracking • Study Goals - Set and monitor daily and weekly learning objectives • Performance Insights - Detailed analytics on learning patterns PRACTICE & CHALLENGES • Daily Challenges - New coding challenges every day with varying difficulty levels • Practice Problems - Extensive collection of problems to test understanding • Difficulty Levels - Problems categorized as Easy, Medium, and Hard • Challenge Tracking - Monitor completion rate and improvement COMPREHENSIVE CONTENT LIBRARY Data Structures: Arrays, Dynamic Arrays, Linked Lists, Stacks, Queues, Deques, Hash Tables, Trees (Binary, BST, AVL, Red-Black, Segment, Fenwick), Heaps, Tries, Suffix Trees, Graphs Algorithms: Sorting (Bubble, Selection, Insertion, Merge, Quick, Heap, Topological), Searching (Linear, Binary), Graph Algorithms (DFS, BFS, Dijkstra's, Bellman-Ford, Floyd-Warshall, Kruskal's, Prim's), String Matching (KMP, Rabin-Karp), Tree Traversal ADDITIONAL FEATURES • Offline Access - All content available offline for learning anywhere • Dark Mode Support - Comfortable studying experience in any lighting • Time Complexity Charts - Visual comparisons of algorithm performance • Related Topics - Discover connected concepts and build understanding • Accessibility - Full VoiceOver support and accessibility features • Computer Science Students - Master fundamentals and advanced topics • Software Engineers - Strengthen algorithmic thinking and problem-solving • Technical Interview Preparation - Comprehensive coverage of interview questions • Self-Learners - Structured learning path from beginner to expert • Competitive Programmers - Advanced algorithms and optimization techniques
Screenshots
Verdict
The clearest difference is in-app purchases: Invention Manual at none against DSA Master's 1. Invention Manual also leads on ads (none vs shown) and iOS requirement (8.0 vs 16.2). DSA Master's advantage is update cadence (weekly vs every 9 months). On price 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. DSA Master sells 1 one-off in-app purchase. Invention Manual asks for nothing beyond the download.
Invention Manual ships an update every 9 months, DSA Master weekly. The most recent releases landed on October 10, 2026 and October 9, 2026 respectively.
| Parameter | Invention Manual | DSA Master |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.2 (35 ratings) — better |
| Positive reviews | — | 12.5% of reviews |
| Number of ratings | — | 35 — better |
| Update frequency | Every 9 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No — better | Yes |
| Monetization | — | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 8.0 — better | 16.2 |
| Further details — not scored | ||
| Size | 67 MB | 150 MB |
| Age rating | 4+ | 4+ |
| Developer | Callan Hodgskin | Alok Singh |
In-app purchases
Invention Manual
No in-app purchases
DSA Master
- Remove Ads$1.99
Questions
Is Invention Manual free?
Is DSA Master free?
Do Invention Manual or DSA Master have ads?
Which is updated more often, Invention Manual or DSA Master?
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