Quantum Retriever vs Monium
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Quantum Retriever
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Not all AIs work the same. With Quantum Retriever, you can search and compare their results. You can compare their answers, to see where they agree and where they don't. You can synthesize their results for more full answers. You can also evaluate specific models head to head, including many open source and experimental models. You can see how they rank on speed, token count, math and logic interpretation, and more. All your queries are only saved locally on your device, and are not shared with anyone outside this app.
Monium
Explore superconducting qubit physics with interactive simulations. Tune parameters, visualize energy spectra, wavefunctions, and coherence times in real-time. Supports Transmon, Tunable Transmon, and Fluxonium qubits.
- Interactive qubit parameter tuning
- Real-time energy spectrum visualization
- Wavefunction and potential plotting
- Coherence time calculations
- Matrix element heatmaps
- Save and reload qubit presets
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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.
Screenshots
Verdict
The clearest difference is price: Quantum Retriever at Free against Monium's $3.99. On ads, in-app purchases, device support and iOS requirement 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
Quantum Retriever is free to download; Monium costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | Quantum Retriever | Monium |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 9 days | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 15.1 | 15.1 |
| Further details — not scored | ||
| Size | 27 MB | 42 MB |
| Age rating | 12+ | 4+ |
| Developer | James Beach | Jens Koch |
In-app purchases
Quantum Retriever
No in-app purchases
Monium
No in-app purchases
Questions
Is Quantum Retriever free?
Is Monium free?
Do Quantum Retriever or Monium have ads?
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