Mathesis vs Big O Notation

Mathesis transforms curiosity into knowledge. Pick a topic you love — Space, Ancient Egypt, History, Quantum Physics, AI — and dive deep with: BITE-SIZED LESSONS Learn in 2-3 minute lessons with beautiful visuals. Complex topics made simple and memorable. SMART FLASHCARDS Spaced repetition ensures you remember what you learn. Review exactly when you need to. CHALLENGING QUIZZES Test your knowledge with carefully crafted questions. Instant feedback and explanations. VISUAL TIMELINES See history unfold chronologically. Tap events for details. TOPICS AVAILABLE: Solar System Space Exploration Ancient Egypt Ancient Rome World War I World War II Physics Chemistry Biology Quantum Physics Economy Art History Psychology Color Theory Botany Cosmology Engineering Artificial Intelligence Computer Science Business Fundamentals Mathematics Geography Archaeology Zoology Agriculture Philosophy -More coming soon! WHY MATHESIS? 100% Offline — Learn anywhere, no internet needed No Accounts — Open and start immediately No Subscriptions No Ads — Ever Privacy First — Your data stays on your device Multilingual — English, 简体中文, 繁體中文, Español Perfect for: Curious minds who want to learn something new Students looking for engaging study tools History and science enthusiasts Trivia lovers who want deeper understanding The name "Mathesis" comes from the ancient Greek μάθησις, meaning "the act of learning." That's exactly what this app is about — not just consuming facts, but truly understanding topics you care about. Start your learning journey today.

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.