Comparison

Quantum Bob vs Systems Thinking Daily

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

Head to head
About

Quantum Bob

Engage with real quantum physics experiments by predicting measurement outcomes from actual quantum computer data. Compete against an AI leveraging quantum entanglement and discover the quantum advantage through interactive gameplay and lessons.

Highlights
  • Real quantum measurement data
  • Compete against quantum AI
  • Local multiplayer
  • Interactive lessons
  • Progress tracking
  • Statistical proof tests
Features
Read full description

QuantumBob puts real quantum physics in your hands. Compete against Alice, an AI that uses actual entanglement data from IBM's quantum processor, by guessing measurement outcomes. Can you beat the quantum advantage? PLAY REAL QUANTUM DATA Every round, a real quantum computer has already measured an entangled particle pair. You guess the result — 0 or 1. Alice reads her linked particle and makes the same prediction. The quantum correlations give her an edge that no classical strategy can match. THE QUANTUM ADVANTAGE Without quantum physics, the best any strategy can achieve is 75% accuracy. But Alice's entangled particles push her to about 85%. That 10% gap is physically impossible without quantum mechanics. You'll see it happen in real time as you play. FEATURES - Real quantum measurement data from IBM's Marrakesh quantum processor - Compete against Alice's quantum-powered AI in 10-round ranked games - Challenge friends with local pass-and-play multiplayer - Learn quantum concepts as you play with contextual tips - Track perfect rounds, win average, and Alice's accuracy over time - Explore interactive lessons on entanglement, Bell's theorem, and the Tsirelson bound - Compare real quantum data against classical fakes side by side - Run built-in statistical proof tests that verify the quantum advantage - Game Center leaderboards to compete globally NO PHYSICS DEGREE REQUIRED QuantumBob starts from zero. The interactive tutorial walks you through everything — from "what is 0 and 1?" to "why can't I beat 75%?" to "what makes quantum special?" You'll understand entanglement through playing, not studying. THE SCIENCE BEHIND THE GAME QuantumBob is built on the CHSH Bell experiment, one of the most important experiments in quantum physics. In 2022, the Nobel Prize in Physics was awarded for work proving that quantum entanglement violates Bell inequalities — exactly what you experience every time you play. All quantum data comes from real IBM quantum hardware. No simulations, no random number generators — actual measurements of entangled qubit pairs. Download QuantumBob and discover why quantum physics breaks the rules.

About

Systems Thinking Daily

Features
Read full description

Systems Thinking Daily helps you think in systems — the mental models used by engineers, strategists, and problem-solvers to understand complexity. Every day, explore one of 30 foundational principles drawn from systems science, complexity theory, and organizational design. Each principle includes a core insight, a practical corollary, and category tags to help you connect ideas. FEATURES: - Daily Principle — a new systems thinking concept each day with full explanation - Flashcard Review — spaced repetition learning across all 30 principles - All Principles — browse, search, and filter by category - Favorites — save principles you want to revisit - Streak tracking — build a daily learning habit PRINCIPLES INCLUDE: Gall's Law, Le Chatelier's Principle, The Generalized Uncertainty Principle, The Functional Indeterminacy Theorem, and 26 more. Built for curious thinkers, engineers, product managers, and anyone who wants to make better decisions in complex environments.

Screenshots

Quantum Bob4 screens
Systems Thinking Daily4 screens

Verdict

The call

The clearest difference is price: Quantum Bob at Free against Systems Thinking Daily's $0.99. Systems Thinking Daily's advantage is iOS requirement (15.1 vs 26.2). On 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

CostPrice · In-app purchases · Ads · Monetization

Quantum Bob is free to download; Systems Thinking Daily costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Scorecard2 real differences · 8 level
Quantum Bob versus Systems Thinking Daily: the parameters behind the verdict, then further details
ParameterQuantum BobSystems Thinking Daily
PriceFree — better$0.99
Rating5.0 (5 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings5 — better—
Update frequencyEvery 2 days—
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPadiPhone, iPod
Requires iOS26.215.1 — better
Further details — not scored
Size13 MB22 MB
Age rating4+4+
DeveloperSquatchCraft LLCJollofCreative LLC

In-app purchases

None

Quantum Bob

No in-app purchases

None

Systems Thinking Daily

No in-app purchases

Questions

Is Quantum Bob free?
Quantum Bob is free to download, with no in-app purchases.
Is Systems Thinking Daily free?
Systems Thinking Daily costs $0.99, with no in-app purchases.
Do Quantum Bob or Systems Thinking Daily have ads?
Neither Quantum Bob nor Systems Thinking Daily shows ads.

Other comparisons