Comparison

FaangIQ vs Big O Notation

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

FaangIQ

Features
Read full description

Master your next FAANG interview with 413+ real interview questions from Google, Amazon, Meta, Apple, Netflix, Microsoft, and Adobe. Study smarter, not harder โ€” no IDE needed. WHY FaangIQ? Unlike platforms that require a computer and IDE, FaangIQ transforms real technical interview questions into a quiz format you can practice anywhere โ€” on the train, during lunch, or before bed. Built for busy engineers who want to make every minute count. WHAT'S INSIDE - 413+ Curated Questions across 12 specialized categories - Real FAANG Interview Questions sourced from actual tech interviews - System Design (55 questions) โ€” scalability, distributed systems, architecture - Coding Logic (137 questions) โ€” algorithms, data structures, Big O notation - Technical MCQs (73 questions) โ€” Operating Systems, DBMS, Networks, OOP - Aptitude & Reasoning (90 questions) โ€” quantitative and analytical thinking - Database Management โ€” SQL, ACID, normalization, transactions - Plus: Riddles, Sequences, Word Problems for lateral thinking THREE DIFFICULTY LEVELS - Easy (137 questions): Build confidence and warm up with fundamentals - Medium (193 questions): Deepen understanding with moderate challenges - Hard (83 questions): FAANG-level difficulty for serious interview prep COMPANIES COVERED Questions sourced from real interviews at Google, Amazon, Meta (Facebook), Apple, Netflix, Microsoft, and Adobe. KEY FEATURES - Practice Mode: Get instant feedback, hints, and explanations as you learn - Test Mode: Simulate real interview conditions with no hints - Progress Tracking: See your accuracy and mastery across every category - Daily Streaks: Stay consistent and build a study habit - Detailed Explanations: Learn why each answer is correct, not just what - Offline First: No internet required โ€” all questions stored locally - Light & Dark Mode: Study comfortably day or night - Haptic Feedback: Feel every correct and incorrect answer WHO IS THIS FOR? - Software engineers preparing for FAANG interviews - CS students getting ready for campus placements - Career changers breaking into tech - Developers leveling up for senior roles - Anyone preparing for technical interviews at top companies FaangIQ is the interview prep app that fits in your pocket. No laptop needed. No subscriptions to expensive platforms. Just you, your phone, and 413+ questions standing between you and your dream job. Download now and start preparing for the interview that changes your career. Why this structure works: Section: First 3 lines Purpose: This is the only part visible before users tap "more" โ€” it's your hook Section: WHY FaangIQ? Purpose: Differentiates you from competitors immediately Section: WHAT'S INSIDE Purpose: Specific numbers build trust and credibility Section: THREE DIFFICULTY LEVELS Purpose: Shows structured progression Section: KEY FEATURES Purpose: Sells the experience, not just content Section: WHO IS THIS FOR? Purpose: Users see themselves in the list โ€” increases conversion

About

Big O Notation

Features
Read full description

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.

Screenshots

FaangIQ4 screens
Big O Notation4 screens

Verdict

The call

FaangIQ and Big O Notation are too close to call on the numbers: across 5 compared parameters โ€” price, ads, in-app purchases and device support among them โ€” neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ScorecardNo meaningful differences
FaangIQ versus Big O Notation: the parameters behind the verdict, then further details
ParameterFaangIQBig O Notation
PriceFreeFree
Update frequencyWeeklyโ€”
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.115.1
Further details โ€” not scored
Size30 MB38 MB
Age rating4+4+
DeveloperYubraj KhatriAFTW LLC

In-app purchases

None

FaangIQ

No in-app purchases

None

Big O Notation

No in-app purchases

Questions

Is FaangIQ free?
FaangIQ is free to download, with no in-app purchases.
Is Big O Notation free?
Big O Notation is free to download, with no in-app purchases.
Do FaangIQ or Big O Notation have ads?
Neither FaangIQ nor Big O Notation shows ads.

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