Comparison

Big O Notation vs Quantum Physics

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

Head to head
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.

About

Quantum Physics

Explore the fundamentals of quantum physics through interactive visuals and simplified lessons. This app breaks down complex concepts like wave-particle duality and entanglement into easy-to-understand explanations and engaging simulations. Track your progress with quizzes and build your knowledge of atoms, photons, and quantum behavior.

Highlights
  • Interactive visual simulations
  • Beginner-friendly lessons
  • Lesson-based quizzes
  • Progress tracking and achievements
  • Glossary of key terms
  • Scientist timeline
Features
Read full description

Quantum Physics: Visual Lab is a beginner-friendly way to explore the strange and fascinating world of atoms, photons, electrons, and quantum behavior. Learn step by step with short lessons written in plain language. Build your understanding of wave-particle duality, the double-slit experiment, superposition, observation and measurement, entanglement, uncertainty, tunneling, qubits, photons, orbitals, quantum fields, and modern quantum technology. Open the Visual Lab to see abstract ideas in motion. Watch interference patterns form, compare particle and wave behavior, explore superposition, adjust uncertainty, observe tunneling probabilities, investigate entanglement, and visualize a qubit. Check your understanding with lesson-based quizzes and a daily quantum question. Review explanations after each answer, track your quiz accuracy, complete lessons, keep a study streak, and earn achievement badges as you progress. Use the glossary to look up key terms quickly, then visit the scientist timeline to learn about the people who shaped quantum physics, including Planck, Einstein, Bohr, Heisenberg, Schrodinger, Dirac, Feynman, and more. Features: - 18 beginner-focused quantum physics lessons - 7 interactive visual simulations - 110 quiz questions with explanations - Daily quantum question - Progress tracking, quiz accuracy, streaks, and achievements - Glossary of key quantum terms - Scientist timeline with short biographies - Plain-language examples, formulas, misconceptions, and real-world applications - Optional lifetime unlock to remove ads and open all premium content Quantum physics can feel mysterious, but it does not have to feel unreachable. Visual Lab turns difficult ideas into clear explanations and interactive moments you can explore at your own pace. Educational note: This app is designed for beginner learning and intentionally simplifies some advanced physics concepts.

Screenshots

Big O Notation4 screens
Quantum Physics4 screens

Verdict

The call

The clearest difference is in-app purchases: Big O Notation at none against Quantum Physics's 1. Big O Notation also leads on ads (none vs shown) and iOS requirement (15.1 vs 26.0). On price 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Quantum Physics sells 1 one-off in-app purchase. Big O Notation asks for nothing beyond the download.

Scorecard3 real differences · 6 level
Big O Notation versus Quantum Physics: the parameters behind the verdict, then further details
ParameterBig O NotationQuantum Physics
PriceFreeFree
Rating—4.0 (1 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—1 — better
AdsNo — betterYes
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.1 — better26.0
Further details — not scored
Size38 MB13 MB
Age rating4+4+
DeveloperAFTW LLCChatStick Company Limited

In-app purchases

None

Big O Notation

No in-app purchases

1 purchases

Quantum Physics

One-time1
  • Unlock All Features$2.99

Questions

Is Big O Notation free?
Big O Notation is free to download, with no in-app purchases.
Is Quantum Physics free?
Quantum Physics is free to download, with in-app purchases available.
Do Big O Notation or Quantum Physics have ads?
Quantum Physics shows ads; Big O Notation does not.

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