qTel vs Quantum Bob
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
qTel
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This app shows how quantum teleportation works. The state of the first qubit is determined by five operators: X, Y, Z, H, U. This state is transferred to the third qubit at the end of all operations on the circuit. The state of three qubits at each step is shown in the box.
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.
- Real quantum measurement data
- Compete against quantum AI
- Local multiplayer
- Interactive lessons
- Progress tracking
- Statistical proof tests
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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
Verdict
The clearest difference is iOS requirement: qTel at 16.0 against Quantum Bob's 26.2. 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 | qTel | Quantum Bob |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (5 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 5 — better |
| Update frequency | — | Every 2 days |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 16.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 6 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | Sungjun Kim | SquatchCraft LLC |
In-app purchases
qTel
No in-app purchases
Quantum Bob
No in-app purchases









