DataStructureAndAlgorithm vs Flash75
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DataStructureAndAlgorithm
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Course Title: Mastering Data Structures and Algorithms Description: This comprehensive course offers an in-depth exploration of fundamental concepts in data structures and algorithms, equipping learners with the knowledge and skills necessary to tackle complex programming challenges with confidence. Whether you're a beginner seeking to establish a strong foundation in computer science or an experienced programmer aiming to enhance your problem-solving abilities, this course has something to offer for everyone. Course Content: Introduction to Data Structures and Algorithms: Understand the importance of data structures and algorithms in computer science. Learn about basic terminology, key concepts, and common applications. Arrays and Linked Lists: Dive into the world of linear data structures. Explore arrays and linked lists, their implementation, operations, advantages, and limitations. Stacks and Queues: Learn about stack and queue data structures, their applications, and implementation using arrays and linked lists. Understand concepts like LIFO and FIFO. Trees and Binary Trees: Explore hierarchical data structures. Study binary trees, their properties, traversal algorithms (inorder, preorder, postorder), and common applications. Graphs: Delve into graph theory. Understand graph representations (adjacency matrix, adjacency list), traversal algorithms (DFS, BFS), and applications like shortest path algorithms. Sorting and Searching Algorithms: Master sorting algorithms (bubble sort, insertion sort, selection sort, merge sort, quick sort) and searching algorithms (linear search, binary search). Analyze their time and space complexity. Hashing: Learn about hash functions, collision resolution techniques (chaining, open addressing), and applications of hashing in data storage and retrieval. Advanced Data Structures: Explore advanced data structures such as heaps, hash maps, AVL trees, red-black trees, and tries. Understand their implementation and usage scenarios. Dynamic Programming: Grasp the concept of dynamic programming and learn how to apply it to solve optimization problems efficiently. Greedy Algorithms: Understand greedy algorithms and their application in solving optimization problems by making locally optimal choices. Algorithmic Problem Solving: Practice solving a variety of algorithmic problems, ranging from simple to complex, to sharpen your problem-solving skills. Complexity Analysis: Master the techniques for analyzing the time and space complexity of algorithms. Understand Big O notation and its significance. Course Format: Detailed written content covering each topic comprehensively. Interactive coding exercises and quizzes to reinforce learning. Real-world examples and case studies to demonstrate the practical relevance of concepts. Hands-on programming assignments to apply theoretical knowledge in practical scenarios. Optional peer-to-peer discussion forums for collaborative learning and problem-solving. Prerequisites: Basic understanding of programming concepts (variables, loops, conditionals). Familiarity with a programming language such as Python, Java, or C++. Outcome: By the end of this course, you will have: A solid understanding of essential data structures and algorithms. Proficiency in analyzing and solving algorithmic problems efficiently. Enhanced problem-solving skills and critical thinking abilities. Confidence to tackle coding interviews and competitive programming challenges. A strong foundation for pursuing advanced topics in computer science. This version focuses solely on the content and does not mention any video lectures.
Flash75
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Flash75 is a lightweight flashcard app based on the popular Grind75 coding path — designed to bring calm, clarity, and focus to your coding prep. One card at a time. Tap. Solve. Flow. That’s it. Hesitating to start? Start solving—easier than ever. No pressure. No clutter. Just progress. Tired of grinding through endless LeetCode lists? Flash75 doesn’t just make prep lighter — it makes it feel better. From chaos to clarity, one question at a time. Every session feels like a quiet step forward. — • 75 essential LeetCode-style questions in card format • Structured into 8 clear sets — unlock as you progress • Track your mistakes and revisit with focus • Elegant, focused interface with calm visuals • Designed for flow, reflection, and confidence-building • No accounts, no noise — just clean offline practice — Waiting in line? On the go? Practice anywhere, in minutes. Whether you're prepping for interviews or reclaiming your confidence in algorithms, Flash75 helps you stay light, focused, and moving forward — one card at a time. Breathe in. Begin. Your path is already unfolding. — Flash75 是一个轻量刷题 App,基于一个广受欢迎的面试刷题路径——社区中的 Grind75 题单,将其转化为轻量卡片模式,用简约的卡片与温柔的节奏,陪你专注完成挑战。 一张卡片,一次点击,轻盈解题。 就是这么简单。 犹豫着不想开始? 开始刷题,从未如此简单。 没有压力、没有干扰,只有清晰的下一步。 还记得刷 LeetCode 的那种疲惫吗? Flash75 想做的,是让你在挑战算法时,不再焦虑冲刺,而是用最轻盈的方式,专注、稳定地走完 75 道题的旅程。 用卡片替代列表,用节奏引导刷题,每一次进入,都是一次安静但坚定的「下一步」。 — • 75 道精选核心题目,卡片形式呈现 • 分为 8 个阶段路径,完成一组即可解锁下一组 • 错题追踪系统,支持反思复习 • 禅意 UI,温柔反馈,鼓励你持续前进 • 支持离线,无账号无干扰,纯净刷题体验 — 无论你是在等地铁、排队、还是睡前躺在床上, Flash75 都能在几分钟内帮你轻松刷题,稳步前进。 开始你专注而轻盈的刷题之路吧。 每一次打开,都是一种掌控感的回归。
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Verdict
The clearest difference is price: Flash75 at Free against DataStructureAndAlgorithm's $7.99. Flash75 also leads on update cadence (every 2 weeks vs every 3 months). On ads, in-app purchases, device support and iOS requirement 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
Flash75 is free to download; DataStructureAndAlgorithm costs $7.99 up front. Neither carries in-app purchases, so what you see is what you pay.
DataStructureAndAlgorithm ships an update every 3 months, Flash75 every 2 weeks. The most recent releases landed on August 2, 2026 and September 13, 2026 respectively.
| Parameter | DataStructureAndAlgorithm | Flash75 |
|---|---|---|
| Price | $7.99 | Free — better |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 16.3 | 15.6 — better |
| Further details — not scored | ||
| Size | 12 MB | 3 MB |
| Age rating | 17+ | 4+ |
| Developer | Buydeepdiscount.com LLC | Wenqi Wang |
In-app purchases
DataStructureAndAlgorithm
No in-app purchases
Flash75
No in-app purchases
Questions
Is DataStructureAndAlgorithm free?
Is Flash75 free?
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Which is updated more often, DataStructureAndAlgorithm or Flash75?
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