# Factorial Calculator vs Modbus TCP FieldKit

The clearest difference is price: Factorial Calculator at Free against Modbus TCP FieldKit's $5.99. Factorial Calculator also leads on iOS requirement (11.0 vs 18.0). Modbus TCP FieldKit's advantage is ads (none vs shown) and update cadence (weekly vs every 12 months). On in-app purchases and device support there is nothing between them.

Factorial Calculator is free to download; Modbus TCP FieldKit costs $5.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Factorial Calculator ships an update every 12 months, Modbus TCP FieldKit weekly. The most recent releases landed on November 4, 2026 and November 7, 2026 respectively.

## The numbers

| Metric | Factorial Calculator | Modbus TCP FieldKit |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/factorial-calculator/id6741139916/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 12 months | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 12 MB | 13 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | +4 |
| Developer | [SDG CODE DOO NIS](https://appshunter.io/developer/1343251532) | [Vladimir Chemeris](https://appshunter.io/developer/1854526571) |

## What reviewers say

### Factorial Calculator

[App page](https://appshunter.io/ios/app/factorial-calculator/id6741139916)

Easily compute the factorial of any whole number with this straightforward utility. Designed for simplicity and ease of use, it provides a quick way to get factorial results.

**Highlights:** Calculate factorials, Whole number input, Easy to use interface, Quick results

**Features:** macOS Compatibility

**In-app purchases:** none


### Modbus TCP FieldKit

[App page](https://appshunter.io/ios/app/modbus-tcp-fieldkit/id6768897913)

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

**In-app purchases:** none


## Frequently asked questions

### Is Factorial Calculator free?

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

### Is Modbus TCP FieldKit free?

Modbus TCP FieldKit costs $5.99, with no in-app purchases.

### Do Factorial Calculator or Modbus TCP FieldKit have ads?

Factorial Calculator shows ads; Modbus TCP FieldKit does not.

### Which is updated more often, Factorial Calculator or Modbus TCP FieldKit?

Factorial Calculator ships an update every 12 months, and Modbus TCP FieldKit weekly. Most recently, Factorial Calculator was updated on November 4, 2026 and Modbus TCP FieldKit on November 7, 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.*