A pocket quantum lab for iPhone and Apple Watch.

Qubit Simulator & Job Monitor is an interactive Bloch sphere, a gate playground with live unitary evolution, a Bell-pair playground that entangles qubits across two phones, and a live tracker for your IBM Quantum and IONQ jobs.

What you can do

Single qubit

Interactive 3D Bloch sphere with a color-mapped texture. Phase drives hue, amplitude drives brightness — every state has a distinct color. Drag to reshape and tap to measure into the |0⟩ or |1⟩ observable.

Gate playground

Tap a gate — X, H, CNOT, SWAP, all the usuals — and the qubit rotates to its new state right there on the sphere. Hit Evolve to slow it down and drag through the rotation yourself, with the unitary matrix updating live as you scrub.

Entangled pair — across two phones

Pick any Bell state — Φ+, Φ−, Ψ+, Ψ− — and share the pair with a nearby iPhone or your Apple Watch. Drag qubit A on one device, the correlated qubit B updates instantly on the other over MultipeerConnectivity (Bluetooth + Wi-Fi, no internet required).

Jobs tracker

Live status for every job you submit to IBM Quantum and IONQ. Rendered circuit diagrams, measurement histograms, runtime, shot count. Works on both iPhone and Apple Watch.

Single-qubit Bloch sphere with cardinal-state presets 4×4 joint density matrix of a Bell state in Z/X/Y bases IBM Quantum job detail with rendered circuit and measurement histogram

On your wrist

IBM Quantum + IONQ jobs list on Apple Watch

On-device by design

The app doesn't have a backend and doesn't collect telemetry. The only network traffic it makes goes to the quantum providers you've set up in Settings.

Keys stay in the Keychain

Your IBM Cloud and IONQ API keys are written directly to the iOS Keychain and read only by the app. Supernetworks never sees them.

Circuits render on-device

Qiskit QPY payloads and IONQ circuit JSON are decoded and drawn right on your phone. The rendering pipeline runs entirely on your device.

Peer-to-peer, no internet

Entangling qubits across two phones uses Apple's MultipeerConnectivity (Bluetooth + peer-to-peer Wi-Fi). The two devices discover each other on the local network and exchange state directly, without needing a login or a server in between.

Simple pricing

Free

$0

for everyone

  • Single-qubit Bloch sphere with six cardinal-state presets
  • Gate playground: I, X, Y, Z, H, S, T, √X, CNOT, CZ, SWAP, √SWAP with animated Bloch rotations
  • Live U(t) time-evolution scrubber for every gate
  • Bell-state entanglement across iPhone + Apple Watch and phone-to-phone
  • Z-basis measurement into the |0⟩ or |1⟩ observable
  • Demo mode with sample jobs and circuits
Upgrade

Jobs Tracker

$4.99

one-time in-app purchase — unlocks iPhone + Apple Watch

  • Live IBM Quantum and IONQ job list with status, backend, and runtime
  • On-device circuit rendering for both IBM Quantum and IONQ jobs
  • Measurement histograms with top-3 outcomes and tail summary
  • Compact watch detail view with histograms and status

Built for

Developers

You submitted a batch of jobs to IBM Quantum and want to check progress without opening a laptop. Watch them on your wrist.

Educators and students

An interactive Bloch sphere for exploring phase, amplitude, and measurement. The color mapping lets students recognize states by sight.

Ship faster. Check jobs anywhere.

Qubit Simulator & Job Monitor is a one-time purchase, no subscription.