# Monium — Superconducting qubit lab

> Mobile companion for superconducting qubit physics simulations. (iPhone/iPad app by Jens Koch.)

- Source: https://appshunter.io/ios/app/monium/id6774312164 (this page in markdown: same URL + `.md`)
- Developer: [Jens Koch](https://appshunter.io/developer/6774312166)
- Category: Education, Utilities
- Price: $3.99
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 15.1 · 42 MB
- Languages: American English
- Released: 2026-06-11
- Data updated: 2026-08-01
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/monium/id6774312164/reviews.md

## What is Monium?

Monium puts superconducting-qubit physics in your pocket — a mobile companion to the open-source scqubits library, built for researchers, students, and the quantum-curious.

Pick a qubit, tune its parameters with live sliders, and watch the physics update in real time:

• Energy spectrum vs. any swept parameter
• Wavefunctions over the potential (and in the charge basis)
• Matrix elements as a heatmap, and vs. the swept parameter
• T1 / T2 coherence times per noise channel
• Exact computed values behind every plot, as tables

Supported qubits: Transmon, Tunable Transmon (SQUID), and Fluxonium.

Built for real work:
• Enter the Josephson energy the way you measure it — critical current, junction inductance, or room-temperature normal-state resistance (with a cryo/room ratio).
• Save and reload presets per qubit.
• Convergence indicators so you can trust the numbers.

Everything runs on-device. No account, no ads, no tracking, no network — your work stays on your phone.

Monium mirrors scqubits' conventions and is validated against it, so the numbers match the desktop tool you already trust.

## Key features

- Interactive qubit parameter tuning
- Real-time energy spectrum visualization
- Wavefunction and potential plotting
- Coherence time calculations
- Matrix element heatmaps
- Save and reload qubit presets


## Frequently asked questions about Monium

### What is Monium?

Monium is a mobile application designed to simulate superconducting qubit physics. It allows users to explore qubit behavior by tuning parameters and visualizing various physical properties in real-time.

### What types of qubits does Monium support?

Monium supports three main types of qubits: Transmon, Tunable Transmon (SQUID), and Fluxonium. Users can select and interact with these qubit models within the app.

### How does Monium handle user data and privacy?

Monium is designed with privacy in mind. It runs entirely on-device, requiring no account, ads, tracking, or network connection, ensuring your work stays private on your phone.

### What are the pricing details for Monium?

Monium is a paid application, available for a one-time purchase of $3.99. There are no in-app purchases or subscriptions required after the initial purchase.

### Does Monium have ads?

No, Monium is ad-free. The application is designed to provide an uninterrupted user experience without any advertisements.

### What devices is Monium compatible with?

Monium is currently supported on iPhones and iPods. The app is designed for iOS devices.

### How often is Monium updated?

The latest version of Monium is 1.0, released on June 11, 2026. Future updates will likely follow to introduce new features or improvements.

### Can I trust the computed values in Monium?

Yes, Monium provides exact computed values behind every plot as tables. It also includes convergence indicators to help users trust the accuracy of the numbers generated by the simulations.

## Version history (last 1 release)

### 1.0 — 2026-06-11

No release notes.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-01.*