# Quantum Retriever vs Monium

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.

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.

## The numbers

| Metric | Quantum Retriever | Monium |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/monium/id6774312164/reviews)** |
| Number of ratings | — | **2** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 9 days | — |
| Monetization | — | Paid |
| Size | 27 MB | 42 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 12+ | 4+ |
| Developer | [James Beach](https://appshunter.io/developer/1879362223) | [Jens Koch](https://appshunter.io/developer/6774312166) |

## What reviewers say

### Quantum Retriever

[App page](https://appshunter.io/ios/app/quantum-retriever/id6759576344)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Monium

[App page](https://appshunter.io/ios/app/monium/id6774312164)

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.

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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Quantum Retriever free?

Quantum Retriever is free to download, with no in-app purchases.

### Is Monium free?

Monium costs $3.99, with no in-app purchases.

### Do Quantum Retriever or Monium have ads?

Neither Quantum Retriever nor Monium shows ads.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*