# Fourier App vs Monium

The clearest difference is price: Fourier App at Free against Monium's $3.99. Fourier App also leads on device support (3 vs 1) and iOS requirement (13.0 vs 16.0). Monium's advantage is ads (none vs shown). On update cadence and in-app purchases there is nothing between them.

Fourier App is free to download; Monium costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Fourier App ships an update every 3 months, Monium every 4 months. The most recent releases landed on October 28, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Fourier App | Monium |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/monium/id6774312164/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | — | Paid |
| Size | 30 MB | 37 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Sthefano Schiavon](https://appshunter.io/developer/1882733645) | [Jens Koch](https://appshunter.io/developer/6774312166) |

## What reviewers say

### Fourier App

[App page](https://appshunter.io/ios/app/fourier-app/id6760314201)

**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 Fourier App free?

Fourier App is free to download, with no in-app purchases.

### Is Monium free?

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

### Do Fourier App or Monium have ads?

Fourier App shows ads; Monium does not.

### Which is updated more often, Fourier App or Monium?

Fourier App ships an update every 3 months, and Monium every 4 months. Most recently, Fourier App was updated on October 28, 2026 and Monium on October 25, 2026.

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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.*