About this app
Learn how quantum computers actually work by playing with adorable cat delivery workers. Qubits are two-color capsules. Cat workers (quantum gates) flip them, superpose them, and entangle them as you route each delivery to its target state. You see probability, phase, and entanglement before you ever touch the math. REAL QUANTUM MECHANICS Every probability, phase, and entanglement you see is an exact quantum simulation. Every puzzle is verified against Qiskit, IBM's quantum computing library. The intuition you build here is the real thing. PLENTY TO PLAY - 126 puzzles across 14 chapters, from X, H, and CNOT up to Sdg and U3 - 22 real quantum gates introduced step by step - Pass each chapter exam to unlock the next - Circuits up to 6 qubits FREE-CIRCUIT SIMULATOR Build any circuit you like and run 1 to 1000 measurement shots. Compare theoretical probabilities with observed results. FOR YOU IF - You are curious about quantum computing but do not know where to start - You are a student or engineer starting out with Qiskit or quantum computing - You just like clever puzzles and cute cats Ads are a single banner only. A one-time "Remove Ads" purchase removes all ads. Every puzzle is free to play.
Latest release
What’s New
Gate training now shows capsules changing as they move through the circuit. Unlocked gates are easier to revisit from the training list. Run, Next, and Reset buttons now use distinct colors and familiar icons.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 25, 2026 · 8:17 AM Free
Screenshots
