CppQuiz.org vs Big O Notation
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
CppQuiz.org
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Improve your C++ skills by solving quiz questions.
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 iOS requirement: Big O Notation at 15.1 against CppQuiz.org's 17. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | CppQuiz.org | Big O Notation |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 5 weeks | — |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 17 | 15.1 — better |
| Further details — not scored | ||
| Size | 4 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | Can Candangelen | AFTW LLC |
In-app purchases
CppQuiz.org
No in-app purchases
Big O Notation
No in-app purchases
