# Multinomial vs Magnetic Field Calc +

The clearest difference is price: Multinomial at Free against Magnetic Field Calc +'s $2.99. On update cadence, ads, in-app purchases and device support there is nothing between them.

Multinomial is free to download; Magnetic Field Calc + costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Multinomial ships an update every 47 months, Magnetic Field Calc + every 27 months. The most recent releases landed on October 6, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Multinomial | Magnetic Field Calc + |
| --- | --- | --- |
| Price | **Free** | $2.99 |
| Rating | — | **[4.0 (1 ratings)](https://appshunter.io/ios/app/magnetic-field-calc-plus/id1423005752/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 47 months | **Every 27 months** |
| Monetization | — | Paid |
| Size | 1 MB | 1 MB |
| Requires iOS | 18.6 | **17.6** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Reinhard MAENNER](https://appshunter.io/developer/578568275) | [Nitrio](https://appshunter.io/developer/321121189) |

## What reviewers say

### Multinomial

[App page](https://appshunter.io/ios/app/multinomial/id578568272)

**Features:** macOS Compatibility

**In-app purchases:** none


### Magnetic Field Calc +

[App page](https://appshunter.io/ios/app/magnetic-field-calc-plus/id1423005752)

Calculate magnetic fields from electric currents with four distinct modes. Solve for any variable, visualize with interactive diagrams, and utilize flexible unit support. Works offline for convenience.

**Highlights:** Four calculation modes (Straight Wire, Loop, Solenoid, Toroid), Solve for any variable (field, current, distance, etc.), Interactive 2D diagrams, Flexible unit support (A, mA, m, cm, mm, T, µT, Gauss), Built-in reference sheet, Save and copy calculations, Offline functionality

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Multinomial free?

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

### Is Magnetic Field Calc + free?

Magnetic Field Calc + costs $2.99, with no in-app purchases.

### Do Multinomial or Magnetic Field Calc + have ads?

Neither Multinomial nor Magnetic Field Calc + shows ads.

### Which is updated more often, Multinomial or Magnetic Field Calc +?

Multinomial ships an update every 47 months, and Magnetic Field Calc + every 27 months. Most recently, Multinomial was updated on October 6, 2026 and Magnetic Field Calc + on September 24, 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.*