Rap App vs Quantum Bob
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rap App
This app helps educators teach vocabulary and concepts to K-12 students through the engaging medium of rap. Teachers can input custom words and topics, and students can then create raps to deepen their understanding.
- Vocabulary teaching through rap
- Customizable word lists
- Concept exploration via rap
- K-12 education focus
- Engaging learning method
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Rap is coming to the classroom! Be an innovative teacher and connect with your students in a way they relate to. Lincoln Address I Confess Do My Best Travel West Chemical Reaction Lights, Camera, Action Division & Subtraction No Satisfaction Rap App is a fun way to teach vocabulary to your students through rapping! It's basically rapping training wheels. Classes can add their vocab worbs and whatever they're learning about to Rap App and then have their students rap about the words to grow their understanding of them! K-12 schools in multiple states in the US are using Rap App and loving it!! Watch some of our videos on our Facebook and you'll see :). Education is Evolving. Be an innovative teacher. Use Rap App. Stay creative, Mr B Rap App mrb@therapapp.com
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 rating: Quantum Bob at 5.0 against Rap App's 4.0. Quantum Bob also leads on update cadence (every 2 days vs every 5 months) and ratings volume (5 vs 1). Rap App's advantage is iOS requirement (10.0 vs 26.2). On price, ads, in-app purchases and monetization model 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.
Quantum Bob holds the better App Store score, 5.0 against 4.0. That said, the two scores are not equally well evidenced: Quantum Bob has 5 ratings behind it against 1, so its average is the more settled of the two.
Rap App ships an update every 5 months, Quantum Bob every 2 days. The most recent releases landed on September 10, 2026 and June 1, 2026 respectively.
| Parameter | Rap App | Quantum Bob |
|---|---|---|
| Price | Free | Free |
| Rating | 4.0 (1 ratings) | 5.0 (5 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 1 | 5 — better |
| Update frequency | Every 5 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 10.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 53 MB | 13 MB |
| Age rating | 12+ | 4+ |
| Developer | Blake Mankin | SquatchCraft LLC |
Customer experience
Rap App
Quantum Bob
In-app purchases
Rap App
No in-app purchases
Quantum Bob
No in-app purchases









