Comparison

Shor's algorithm vs Quantum Bob

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

Head to head
About

Shor's algorithm

Features
Read full description

This app is a demonstration of Shor's algorithm. You can get some help to understand Shor's algorithm.

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.

Screenshots

Shor's algorithm2 screens
Quantum Bob4 screens

Verdict

The call

The clearest difference is in-app purchases: Quantum Bob at none against Shor's algorithm's 3. Quantum Bob also leads on update cadence (every 2 days vs every 6 months). Shor's algorithm's advantage is iOS requirement (16.0 vs 26.2). On price, ads 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. Shor's algorithm sells 3 one-off in-app purchases. Quantum Bob asks for nothing beyond the download.

UpkeepUpdate frequency

Shor's algorithm ships an update every 6 months, Quantum Bob every 2 days. The most recent releases landed on September 28, 2026 and September 29, 2026 respectively.

Scorecard3 real differences · 7 level
Shor's algorithm versus Quantum Bob: the parameters behind the verdict, then further details
ParameterShor's algorithmQuantum Bob
PriceFreeFree
Rating—5.0 (5 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—5 — better
Update frequencyEvery 6 monthsEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
Monetization—Free
DevicesiPhone, iPadiPhone, iPad
Requires iOS16.0 — better26.2
Further details — not scored
Size7 MB13 MB
Age rating4+4+
DeveloperSungjun KimSquatchCraft LLC

In-app purchases

3 purchases

Shor's algorithm

One-time3
  • coffee$0.99
  • latte$4.99
  • whopper set$9.99
None

Quantum Bob

No in-app purchases

Questions

Is Shor's algorithm free?
Shor's algorithm is free to download, with in-app purchases available.
Is Quantum Bob free?
Quantum Bob is free to download, with no in-app purchases.
Do Shor's algorithm or Quantum Bob have ads?
Neither Shor's algorithm nor Quantum Bob shows ads.
Which is updated more often, Shor's algorithm or Quantum Bob?
Shor's algorithm ships an update every 6 months, and Quantum Bob every 2 days. Most recently, Shor's algorithm was updated on September 28, 2026 and Quantum Bob on September 29, 2026.

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