# DSA preparation in JavaScript > Learn data structures and algorithms in JavaScript with a code compiler & tutor Canonical page: [https://chrome-stats.com/d/com.learnsimpli.dsainjavascript](https://chrome-stats.com/d/com.learnsimpli.dsainjavascript) ## Overview - **ID:** `com.learnsimpli.dsainjavascript` - **Platform:** Android - **Type:** Android app - **Status:** Available - **Publisher:** Learn Simpli - **Category:** EDUCATION - **Downloads:** 25 - **Version:** 1.6.1 - **Last updated:** 2026-08-19 - **First published:** 2026-06-25 - **Publisher country:** IN - **Size:** 45 MB - **Data as of:** 2026-09-16 - **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.learnsimpli.dsainjavascript) - **Website:** [https://www.learnsimpli.com](https://www.learnsimpli.com/) - **Privacy policy:** [https://www.learnsimpli.com/privacy-policy/](https://www.learnsimpli.com/privacy-policy/) ## Description Master DSA — data structures and algorithms in JavaScript — exactly as they are evaluated in software engineering interviews, coding tests, and front-end development assessments. Built for web development students and software professionals, this app pairs clear, structured lessons with runnable source code, a built-in JS code editor, an online compiler, and an AI tutor.

📚 DATA STRUCTURES FOUNDATION
Study structured programming lessons covering arrays, strings, linked lists, stacks, queues, and hashing, then progress into binary trees, graphs, heaps, and tries. Every subtopic gives algorithmic theory, guided coding practice, and a quick summary, with time and space complexity analysis in Big O notation, and a quick check quiz confirms each lesson.

⚙️ ALGORITHM PATTERNS THAT WIN INTERVIEWS
Master sorting, searching, recursion, two-pointer, and sliding-window patterns, then tackle greedy algorithms and dynamic programming through classics like the knapsack problem, longest common subsequence, and matrix DP.

💻 MOBILE CODE RUNNER & COMPILER
Solve coding problems directly in the native code editor and online compiler — no setup. Execute your JavaScript solutions against hidden unit test cases, compare with optimized reference answers, and watch algorithms run live. The runner also supports Python, Java, C++, Go, TypeScript, Rust, Dart, Kotlin, and Swift.

🎯 ALGO LAB: FAANG-STYLE PROBLEMS
Open the dedicated Algo Lab to solve high-yield FAANG and MAMAA algorithmic coding problems with comprehensive, optimized solutions — the questions top tech companies actually ask.

📝 QUIZZES, MOCK TESTS & INTERVIEW QUESTIONS
Take topic-wise multiple-choice quizzes that scale from easy to hard, with a clear logical explanation behind every answer and automatic flagging of your low-accuracy weak areas. Timed mock tests blend theory, MCQs, and coding with result analytics, and curated interview questions come with hints and model answers.

🔁 SPACED REPETITION
Every question you get wrong is queued for spaced-repetition review, returning at smart intervals until you truly know it — so weak topics get fixed before the coding interview.

🤖 SMART MENTOR AI TUTOR
Never stay stuck on a binary tree traversal or a confusing graph algorithm. Chat for lesson-aware hints, review runtime errors, upload photos of code or diagrams, or run a realistic mock interview session. An automated seven-day study plan blends concept review, coding practice, and interview drills.

📊 ANALYTICS, STREAKS & LEADERBOARDS
Monitor your consistency with activity charts, tracked study minutes, and completed milestones. Keep a daily check-in streak, earn XP and coding badges, and climb the global leaderboard.

🌐 BUILT FOR EVERYONE
Works offline with light and dark themes, in English, Hindi, Kannada, Tamil, and Telugu with technical term protection to keep code syntax safe.

JavaScript and other language names or logos are trademarks of their respective owners. This application is an independent learning platform and is not affiliated with or endorsed by them. ## Rankings - #2,527,708 — Overall ## Permissions and access ### Permissions - `android.permission.ACCESS_ADSERVICES_AD_ID` - `android.permission.ACCESS_ADSERVICES_ATTRIBUTION` - `android.permission.ACCESS_NETWORK_STATE` - `android.permission.INTERNET` - `android.permission.POST_NOTIFICATIONS` - `android.permission.WAKE_LOCK` - `com.android.vending.BILLING` - `com.android.vending.CHECK_LICENSE` - `com.google.android.c2dm.permission.RECEIVE` - `com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE` - `com.google.android.gms.permission.AD_ID` - `com.google.android.providers.gsf.permission.READ_GSERVICES` - `com.learnsimpli.dsainjavascript.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION` ## Similar extensions and apps - [DSA preparation in C++](https://chrome-stats.com/d/com.learnsimpli.dsaincpp) — 27 users - [DSA preparation in Java](https://chrome-stats.com/d/com.learnsimpli.dsainjava) — 45 users - [DSA Academy: Coding Prep](https://chrome-stats.com/d/com.dsaacademy.codingprep) — 2,263 users - [DSA preparation in Python](https://chrome-stats.com/d/com.learnsimpli.dsainpython) — 60 users - [Learn JavaScript -DSA & Coding](https://chrome-stats.com/d/com.learn.javascript.programming) — 345 users - [Data Structures & Algorithms](https://chrome-stats.com/d/data.structures.algorithms.computer.science) — 1,031 users - [DSA Visualizer](https://chrome-stats.com/d/com.lakshit.DSAVisualizer) — 114 users - [Data Structure and Algorithms](https://chrome-stats.com/d/com.rak.dsa) — 4,083 users - [MASTER DSA](https://chrome-stats.com/d/com.nerotechnologies.masterdsa) — 27 users - [DSA Ally](https://chrome-stats.com/d/com.dsaally) — 146 users - [Data Structures and Algorithms](https://chrome-stats.com/d/com.learnsimpli.data_structures_and_algorithms) — 63,638 users, 3.40 / 5 - [Data Structures & Algorithms](https://chrome-stats.com/d/com.trsj.dsa.app) — 132 users --- Source: [Chrome-Stats](https://chrome-stats.com/d/com.learnsimpli.dsainjavascript)