PocketDSA vs Big O Notation
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
PocketDSA
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Crack your coding interview - 3 questions a day, 10 minutes, zero burnout. PocketDSA is built for engineers and CS students who want to land offers at Google, Meta, Amazon, Apple, and Microsoft โ without the overwhelm of grinding 300+ LeetCode problems at once. โ โ โ HOW IT WORKS Every day, you get 3 carefully curated DSA questions. You solve them. You move on. Over weeks, you build real interview readiness through consistency โ not cramming. โ โ โ WHAT YOU GET - Daily 3-Question Routine โ Finish in ~10 minutes. Build a streak. Stay sharp without burning out. - Company Packs โ Practice with actual interview questions from Google, Meta, Amazon, Apple, Microsoft and more. - AI Readiness Score โ After each session, get a concise score and actionable feedback on exactly what to improve next. - Progress Tracking โ See your mastery, weak spots, streaks, and improvement over time. - Privacy First โ We don't sell your data. Ever. โ โ โ WHY DAILY PRACTICE BEATS CRAMMING Research is clear: spaced repetition and consistent short sessions outperform marathon study sessions for retention and recall. PocketDSA is built around this principle โ small daily progress compounds into real interview confidence. โ โ โ PERFECT FOR - CS students preparing for internship or new grad interviews - Engineers targeting FAANG or top tech companies - Anyone who started LeetCode, burned out, and wants a sustainable approach - Busy professionals who only have 10โ15 minutes a day โ โ โ Start today. 3 questions. 10 minutes. One step closer to your dream job. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Big O Notation
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Big O Notation is an independent study app for learning, reviewing, and practicing algorithm complexity. It is built for students, self-taught developers, coding interview candidates, and anyone who wants clearer intuition for time and space complexity. Study across Fundamentals, Practical Skills, Common Pitfalls, and Advanced Concepts with 160 focused questions. Every question includes an explanation so you can understand why an answer is right and where your reasoning went off track. Features: - FSRS spaced-repetition intervals for smarter review - Weak-point heatmap to spot topics that need attention - Daily challenge for steady practice - Mock exams for timed review - Offline practice - No login required Practice offline, no login required. Independent study app for Big O Notation practice. Not affiliated with, endorsed by, or sponsored by any company, certification body, exam operator, or vendor. All trademarks belong to their respective owners.
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Verdict
The clearest difference is in-app purchases: Big O Notation at none against PocketDSA's 2. On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. PocketDSA sells 2 in-app purchases, starting at $3.99 per month. Big O Notation asks for nothing beyond the download.
| Parameter | PocketDSA | Big O Notation |
|---|---|---|
| Price | Free | Free |
| Update frequency | Weekly | โ |
| Ads | No | No |
| In-app purchases | Yes | No โ better |
| Devices | iPhone, iPod | iPhone, iPad, iPod โ better |
| Requires iOS | 15.1 | 15.1 |
| Further details โ not scored | ||
| Size | 49 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Ayusch Jain | AFTW LLC |
In-app purchases
PocketDSA
- PocketDSA Pro - Monthly$3.991 Month
- PocketDSA Pro - Yearly$34.991 Year
Big O Notation
No in-app purchases
Questions
Is PocketDSA free?
Is Big O Notation free?
Do PocketDSA or Big O Notation have ads?
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